Marketing Analytics

Chapter 1
Foundations of Marketing Analytics

Bachelors Program in Business Analytics
Marketing Analytics   •   Bachelor

Foundations of Marketing Analytics

Introduction

Marketing analytics is the systematic use of data, analytical methods, technology, and managerial judgment to understand markets and improve marketing decisions. It connects customer behavior with commercial outcomes such as revenue, profit, retention, brand equity, and customer lifetime value.

Modern organizations collect data from websites, mobile applications, customer relationship management systems, advertising platforms, point-of-sale systems, loyalty programs, surveys, call centers, and social media. Data availability, however, does not automatically create insight. Marketing analytics adds value when it helps an organization answer a decision question, select an appropriate action, and evaluate whether that action worked.

For example, “How many people visited our website?” is a descriptive question. “Why did conversion decline?” is a diagnostic question. “Which customers are likely to churn?” is a predictive question. “Which offer should each customer receive?” is a prescriptive question. “Did the campaign cause additional sales?” is a causal question. These questions require different evidence, methods, and standards of interpretation.

This chapter establishes the conceptual foundation for later study of segmentation, forecasting, experimentation, customer analytics, digital analytics, and marketing performance measurement.

Learning Objectives

By the end of this chapter, you should be able to:

  1. Explain the scope, evolution, and organizational value of marketing analytics.
  2. Distinguish descriptive, diagnostic, predictive, prescriptive, and causal analytics.
  3. Relate marketing strategy to segmentation, targeting, positioning, the marketing mix, and the customer journey.
  4. Translate broad marketing concerns into measurable decision problems.
  5. Define appropriate key performance indicators and distinguish them from diagnostic metrics and targets.
  6. Evaluate practical, ethical, and governance issues in the use of marketing data.

1. The Scope and Evolution of Marketing Analytics

Marketing analytics covers the measurement and analysis of markets, customers, competitors, marketing activities, and business outcomes. Its scope includes:

  • Market analytics: market size, growth, category structure, competition, and demand patterns.
  • Customer analytics: acquisition, behavior, needs, satisfaction, retention, and lifetime value.
  • Campaign analytics: reach, engagement, response, conversion, incremental sales, and return on investment.
  • Product and pricing analytics: product adoption, price sensitivity, assortment, promotions, and profitability.
  • Channel analytics: performance of retail, sales force, e-commerce, mobile, social, and distribution channels.
  • Brand analytics: awareness, consideration, preference, associations, and perceived differentiation.
  • Marketing operations analytics: budgets, workflows, data quality, attribution, and technology utilization.

Historically, marketing decisions relied heavily on managerial experience, market surveys, sales reports, and periodic research studies. These sources remain valuable, but digital systems have increased the volume, velocity, and granularity of available data. Organizations can now observe events such as an impression, click, search, product view, cart addition, purchase, complaint, or repeat visit at individual or aggregate levels.

The evolution of marketing analytics can be viewed in four broad stages:

StageTypical capabilityMain managerial question
ReportingPeriodic summaries and dashboardsWhat happened?
Business intelligenceTrend, segment, and variance analysisWhere and why did it happen?
Advanced analyticsForecasting, scoring, optimization, and experimentationWhat is likely to happen, and what should we do?
Data-driven decision systemsIntegrated measurement, automation, and causal learningWhich action creates sustainable incremental value?

These stages overlap. A sophisticated organization still needs accurate reporting, while a small organization may gain substantial value from simple, well-defined measures. Sophistication should be judged by decision quality, not by the complexity of software or algorithms.

2. The Value of Marketing Analytics

Marketing analytics creates value through several mechanisms.

Better resource allocation. Firms can compare channels, customer segments, products, and campaigns using consistent measures. This supports decisions about budgets and sales effort.

Improved customer understanding. Behavioral and attitudinal data can reveal differences among customers that are hidden by overall averages.

More relevant experiences. Analytics can support recommendations, personalized content, service prioritization, and timely communications. Relevance can improve customer value, but personalization must remain transparent and proportionate.

Faster learning. Experiments, dashboards, and automated feedback loops allow organizations to learn more quickly than annual planning cycles permit.

Risk reduction. Monitoring unusual behavior can identify fraud, delivery problems, declining satisfaction, or campaign waste.

Strategic accountability. Analytics connects marketing activities to business outcomes rather than treating impressions or activity volume as proof of success.

Analytics does not replace strategy or judgment. A model may identify customers likely to purchase, but management must decide whether contacting them is profitable, permissible, and consistent with the brand. Data can improve a decision without determining it completely.

3. From Marketing Strategy to Measurement

3.1 Strategy and objectives

Marketing strategy specifies how an organization will create, communicate, deliver, and capture value for selected customers. Analytics should begin with a strategic objective, such as:

  • increase profitable acquisition in an attractive segment;
  • improve retention among high-value customers;
  • increase adoption of a new product;
  • strengthen consideration among a target audience; or
  • improve return on a constrained marketing budget.

An objective is not yet a decision problem. A decision problem identifies an action, a population, a time frame, and a success criterion. For example:

Which of three acquisition channels should receive the next $100,000 over the next quarter to maximize incremental contribution profit among new small-business customers?

This is more useful than “understand our acquisition performance” because it defines the decision, scope, resource constraint, and outcome.

3.2 Segmentation, targeting, and positioning

The STP framework organizes the movement from a broad market to a focused value proposition.

  1. Segmentation divides a market into groups with meaningful differences in needs, behavior, value, or response.
  2. Targeting evaluates segments and selects those the organization will serve.
  3. Positioning establishes how the offering should be understood relative to alternatives by the target customer.

Analytics can support each stage. Segmentation may use demographic, geographic, psychographic, behavioral, firmographic, or value-based variables. Targeting can incorporate segment attractiveness, strategic fit, accessibility, expected profitability, and competitive intensity. Positioning can be assessed through surveys, search behavior, review analysis, brand tracking, and competitive research.

A segment is not automatically valuable because it is statistically distinct. It should also be measurable, substantial or strategically important, accessible, differentiable, and actionable. A technically elegant cluster that cannot be reached or served profitably is not a useful marketing segment.

3.3 The marketing mix

The marketing mix traditionally includes product, price, place, and promotion. Contemporary applications often extend this framework, especially for services, to people, process, and physical evidence.

Analytics questions include:

  • Product: Which features are associated with adoption, satisfaction, or repeat purchase?
  • Price: How does demand respond to different prices, discounts, or bundles?
  • Place: Which channels provide convenient access and acceptable economics?
  • Promotion: Which communication or incentive produces incremental response?
  • People and process: How do service interactions affect satisfaction, retention, and advocacy?

The mix should be analyzed as an interconnected system. A discount may increase conversion while reducing margin. A faster delivery promise may increase acquisition while raising fulfillment costs. A campaign may generate sales that would have occurred without advertising. Marketing analytics therefore needs business-outcome measures, not only activity measures.

3.4 The customer journey

The customer journey describes stages through which a person or organization may move, such as awareness, consideration, evaluation, purchase, onboarding, use, service, renewal, and advocacy. Journeys are not always linear: customers may enter at different stages, revisit earlier stages, use multiple channels, or abandon the process.

Analytics can connect journey events with stage-specific objectives:

Journey stagePossible objectiveExample measures
AwarenessBuild qualified attentionReach, aided awareness, qualified visits
ConsiderationEncourage evaluationProduct views, comparison activity, leads
ConversionGenerate profitable transactionsConversion rate, revenue, contribution margin
OnboardingEnable successful first useActivation rate, time to first value
RetentionMaintain valuable relationshipsRenewal, repeat purchase, churn rate
AdvocacyEncourage voluntary recommendationReferral rate, review quality, advocacy measures

A journey map is a conceptual model, not proof that every customer follows the same sequence. It should be tested against customer data and research.

4. The Five Analytical Questions

4.1 Descriptive analytics: What happened?

Descriptive analytics summarizes historical or current data. Examples include monthly revenue, campaign reach, conversion by channel, and retention by cohort. Common tools are frequency tables, averages, percentages, cross-tabulations, dashboards, and time-series charts.

A conversion rate is commonly defined as:

Conversion rate = Number of conversions ÷ Number of eligible opportunities × 100%

The numerator and denominator must be defined consistently. If conversions are purchases, the denominator might be sessions, visitors, leads, or exposed customers. These alternatives answer different questions and must not be casually compared.

Descriptive analytics is essential but limited. A rise in sales describes an outcome; it does not establish which marketing activity caused it.

4.2 Diagnostic analytics: Why did it happen?

Diagnostic analytics investigates explanations for observed results. Techniques include variance analysis, drill-downs, cohort analysis, segmentation, funnel analysis, correlation analysis, and root-cause investigation.

Suppose conversion declined. A diagnostic analysis might compare performance by device, location, traffic source, product, customer type, and date. It may reveal that the decline occurred only on mobile devices after a checkout release. That finding suggests a testable operational explanation, but it is not automatically causal: other events may have occurred at the same time.

Correlation measures association, not necessarily causation. Confounding variables, selection effects, reverse causality, and measurement error can produce misleading relationships.

4.3 Predictive analytics: What is likely to happen?

Predictive analytics estimates future or unobserved outcomes using historical data. Examples include churn prediction, demand forecasting, response propensity, lead scoring, and customer lifetime value estimation.

A predictive score is useful only when it supports an action. A churn model may rank customers by risk, but the organization must determine whether an intervention can change behavior and whether its benefit exceeds its cost. Predictive accuracy alone is insufficient.

Important evaluation concepts include separating training and test data, avoiding information leakage, checking performance across relevant groups, and assessing calibration. A model that performs well historically may fail when customer behavior, pricing, competitors, or media conditions change.

4.4 Prescriptive analytics: What should we do?

Prescriptive analytics recommends actions under objectives, constraints, and uncertainty. Examples include allocating a media budget, selecting an offer, prioritizing sales leads, choosing a promotion schedule, or determining contact frequency.

A prescriptive recommendation depends on more than predicted response. It should consider cost, margin, capacity, customer experience, legal restrictions, risk, and strategic priorities. An action that maximizes clicks may be inferior to one that produces fewer clicks but greater incremental profit.

4.5 Causal analytics: What effect did an action produce?

Causal analytics estimates the change in an outcome attributable to an intervention. The central question is not “Did sales occur after the campaign?” but “How different were sales because of the campaign from what they would have been without it?” The latter is a counterfactual outcome and cannot be directly observed for the same customer at the same time.

Randomized controlled experiments, such as holdout tests or geo experiments, are often the strongest practical design. Customers or markets are randomly assigned to treatment and control conditions, and outcomes are compared under appropriate assumptions. Quasi-experimental methods may be used when randomization is infeasible, but their credibility depends on design and assumptions.

A simple incremental effect can be expressed as:

Incremental effect = Average outcome for treatment − Average outcome for control

This expression is interpretable as a causal effect only when the design supports comparability between groups and treatment assignment is appropriately handled. The outcome, time period, population, and unit of analysis must be specified.

4.6 Relationship among the analytical types

The five types are complementary rather than mutually exclusive. A campaign evaluation may use descriptive analytics to report results, diagnostic analytics to locate differences, predictive analytics to identify likely responders, prescriptive analytics to choose future spending, and causal analytics to estimate incremental impact.

5. Metrics, KPIs, and Measurement Design

A metric is a quantified measure. A KPI is a metric judged especially important for evaluating progress toward a defined objective. A target is a desired level of performance by a specified time. A leading indicator may signal future performance, whereas a lagging indicator records an outcome after it occurs.

For example, an organization seeking profitable retention might use:

  • leading indicators: successful onboarding, product usage, service resolution;
  • outcome KPIs: renewal rate, churn rate, contribution profit;
  • diagnostic measures: complaint type, response time, feature usage;
  • target: reduce annual churn from 18% to 14% by the end of the fiscal year.

Useful KPI design follows several principles:

  1. Strategic relevance: the measure reflects an important objective.
  2. Clear definition: numerator, denominator, population, time period, and data source are documented.
  3. Controllability: the responsible team can influence the outcome.
  4. Timeliness: information arrives soon enough to support action.
  5. Comparability: definitions remain stable across periods or changes are explicitly documented.
  6. Balanced interpretation: volume, value, quality, and customer impact are considered together.

Common marketing formulas include:

Customer acquisition cost (CAC) = Attributable acquisition cost ÷ Number of new customers acquired
Retention rate = Customers retained during period ÷ Customers at risk at beginning of period × 100%
Return on marketing investment (ROMI) = Incremental contribution profit from marketing ÷ Marketing investment

CAC requires a defined attribution window and cost scope. Retention rate requires a clear definition of “retained” and “at risk.” ROMI should use incremental contribution profit rather than unadjusted revenue when the purpose is economic evaluation. These formulas are not universally comparable unless definitions, time periods, and populations match.

A KPI tree can connect strategic outcomes to operational drivers. For example, contribution profit may depend on customers acquired, average order value, gross margin, repeat purchase, and service cost. A tree helps analysts avoid optimizing one measure while damaging the overall objective.

6. Formulating a Measurable Decision Problem

A disciplined problem formulation process can be written as six questions:

  1. Decision: What action must be selected, changed, or stopped?
  2. Decision-maker: Who can act on the result?
  3. Population: Which customers, products, markets, or channels are included?
  4. Outcome: What business or customer result matters?
  5. Time frame: When will the decision be made and evaluated?
  6. Constraints: What limits exist concerning budget, capacity, policy, privacy, or brand risk?

Consider the vague statement: “Our email marketing is not working.” A measurable formulation would be:

Should the retailer continue, redesign, or reduce promotional email contacts for dormant customers during the next eight weeks, and which option maximizes incremental contribution profit without increasing complaint rates beyond the approved threshold?

This formulation identifies alternatives, a population, a time horizon, a financial outcome, and a customer-experience constraint. It also signals that a randomized holdout test may be more informative than simply comparing recipients with non-recipients, because people selected for email may already differ from those not selected.

7. Illustrative Case: Northstar Outdoor Equipment

This is a fictional illustrative case.

Background

Northstar Outdoor Equipment sells hiking and camping products through stores and an online channel. Its paid search expenditure increased by 25 percent over one year, while online revenue increased by 12 percent. Managers disagreed about whether search advertising was creating profitable growth or merely receiving credit for customers who would have purchased anyway.

Problem

The marketing team needed to decide how to allocate the next quarter’s search budget. The initial proposal was to shift spending toward keywords with the highest last-click revenue. The analytics manager argued that last-click revenue was descriptive attribution, not evidence of incremental impact.

Analysis

The team first defined the decision: choose the budget allocation across branded search, non-branded search, and shopping placements. The primary outcome was incremental contribution profit over 30 days. Secondary measures included new-customer acquisition, average order value, and cancellation rate.

Descriptive analysis showed that branded search had the highest conversion rate. Diagnostic analysis found that many branded-search users had visited Northstar through email or direct traffic earlier in the journey. This suggested that branded search might be capturing existing demand.

The team then conducted a randomized geo experiment. Comparable geographic markets were assigned to different advertising-intensity conditions for four weeks, while inventory and pricing were held as constant as possible. The analysis compared sales and contribution profit between treatment and control markets, accounting for pre-period differences.

Approach and solution

The resulting decision used three forms of evidence:

  • historical reporting to understand scale and trend;
  • customer-journey analysis to identify overlap among channels; and
  • experimental evidence to estimate incremental impact.

The team did not eliminate branded search entirely. Instead, it reduced spend where the experiment showed low incremental return, protected high-performing non-branded terms, and established a recurring holdout test. It also created a measurement dictionary defining “new customer,” “conversion,” “incremental profit,” and the attribution window.

Outcome

Northstar improved budget discipline and reduced disagreement among channel managers. The most important outcome was not a single universally correct channel ranking; it was a repeatable process for learning under changing conditions. Managers also recognized that a channel can assist a purchase and still have low incremental value if the purchase would have occurred without it.

Learning points

  1. High observed performance does not necessarily mean high causal impact.
  2. The correct KPI depends on the decision objective.
  3. Customer journeys are useful for generating hypotheses but do not by themselves prove causality.
  4. Measurement definitions and governance are part of analytical quality.
  5. Experimental learning should be integrated with, not substituted for, managerial judgment.

8. Challenges, Ethics, and Governance

Data quality and integration

Duplicate customer records, missing values, inconsistent campaign names, tracking failures, and changing definitions can invalidate analysis. A dashboard may be technically accurate while representing an incomplete or biased view of performance.

Attribution limitations

Rules such as last-click, first-click, or linear attribution allocate credit; they do not necessarily estimate incremental effects. Attribution can be useful for operational reporting, but causal claims require stronger designs.

Privacy and consent

Marketing analytics must respect applicable privacy and data-protection requirements. Organizations should define lawful purposes, collect only necessary data, protect sensitive information, communicate clearly with individuals, and honor rights concerning access, correction, deletion, or objection where applicable. Consent, where required, should not be treated as a substitute for responsible use.

Fairness and discrimination

Segmentation and predictive models can reproduce historical inequalities. Analysts should examine whether variables act as proxies for protected characteristics, whether errors differ across groups, and whether a marketing action unfairly excludes or disadvantages people. Fairness is a business and social responsibility, not merely a technical metric.

Transparency and explainability

Customers and decision-makers should be able to understand important uses of their data at an appropriate level. Highly complex models may be justified in some settings, but opacity increases governance and communication challenges.

Security and access control

Customer data should be protected through appropriate authentication, authorization, encryption, retention limits, monitoring, and incident-response procedures. Access should follow the principle of least privilege.

Artificial intelligence

AI can support text classification, recommendation, forecasting, audience selection, creative testing, and conversational service. However, generative and predictive systems may hallucinate, amplify bias, expose confidential data, or optimize a narrow metric at the expense of customer welfare. Human oversight, documented evaluation, approved data use, version control, and ongoing monitoring are essential.

9. Best Practices for Beginning Marketing Analytics

  1. Start with a decision, not with an available dataset.
  2. Define the outcome and its business meaning before selecting a method.
  3. Distinguish revenue, profit, contribution, and incremental impact.
  4. Maintain a measurement dictionary and data lineage.
  5. Use descriptive analysis to establish facts, but do not overstate causal conclusions.
  6. Compare performance across meaningful segments and cohorts.
  7. Use experiments when causal impact matters and experimentation is feasible.
  8. Check data quality, model performance, stability, and fairness.
  9. Present uncertainty and limitations rather than false precision.
  10. Build feedback loops so that decisions and outcomes improve future analysis.

Chapter Summary

Marketing analytics applies data, methods, technology, and judgment to marketing decisions and business outcomes. Its scope includes markets, customers, campaigns, products, prices, channels, brands, and marketing operations. Its evolution has moved from reporting toward integrated prediction, optimization, experimentation, and continuous learning.

The STP framework links market understanding to selected customers and a differentiated position. The marketing mix and customer journey translate strategy into activities and interactions that can be measured. Strong analytics begins with a clearly formulated decision problem that specifies the action, population, outcome, time frame, and constraints.

Descriptive analytics explains what happened; diagnostic analytics investigates why; predictive analytics estimates what is likely to happen; prescriptive analytics recommends what should be done; and causal analytics estimates the effect of an intervention relative to a credible counterfactual. These forms of analytics complement one another but should not be treated as interchangeable.

Metrics quantify performance, whereas KPIs are strategically important measures and targets specify desired performance levels. Appropriate definitions, balanced outcomes, data governance, privacy protection, fairness, and responsible use of AI are necessary for trustworthy marketing analytics.

Key Terms

Marketing analytics: The use of data and analytical methods to improve marketing decisions and outcomes.

Descriptive analytics: Analysis that summarizes what has happened or is happening.

Diagnostic analytics: Analysis that investigates potential explanations for an observed result.

Predictive analytics: Analysis that estimates likely future or unobserved outcomes.

Prescriptive analytics: Analysis that recommends actions under objectives and constraints.

Causal analytics: Analysis that estimates the effect attributable to an intervention.

Segmentation: Division of a market into meaningful groups with relevant similarities or differences.

Targeting: Selection of market segments to serve.

Positioning: Intended meaning and differentiation of an offering in the customer’s mind.

Marketing mix: Coordinated marketing decisions concerning elements such as product, price, place, and promotion.

Customer journey: The sequence of interactions and experiences through which a customer may move.

Metric: A quantified measure of an activity, behavior, or outcome.

Key performance indicator: A strategically important metric used to assess progress toward an objective.

Leading indicator: A measure that may signal future performance.

Lagging indicator: A measure of an outcome after it has occurred.

Conversion rate: The proportion of defined opportunities that produce a specified conversion.

Customer acquisition cost: Acquisition expenditure divided by the defined number of new customers acquired.

Incrementality: The change in outcome caused by an intervention relative to an appropriate counterfactual.

Attribution: A rule or method for assigning credit for an outcome across marketing contacts.

Data governance: Policies, roles, controls, and practices that support responsible and reliable data use.

Review Questions

Short Answer Questions

  1. What is marketing analytics, and how does it differ from simply collecting marketing data?
  2. Distinguish a metric, a KPI, and a target.
  3. What are the three components of the STP framework?
  4. Why does correlation not by itself establish causation?
  5. State two requirements for formulating a measurable marketing decision problem.

Long Answer Questions

  1. Explain the evolution of marketing analytics from reporting to causal and prescriptive decision support.
  2. Compare descriptive, diagnostic, predictive, prescriptive, and causal analytics, using a campaign evaluation as an example.
  3. Explain how marketing strategy, the STP framework, the marketing mix, and the customer journey are connected.
  4. Discuss the principles of effective KPI design and explain why definitions and denominators matter.
  5. Evaluate the principal ethical, privacy, fairness, and governance challenges in contemporary marketing analytics.

Analytical / Application Questions

  1. A retailer reports that customers who receive promotional emails purchase more frequently than customers who do not. Design an analysis that would distinguish descriptive association from incremental causal impact.
  2. Formulate a complete decision problem for a subscription business experiencing rising churn. Specify the decision, population, outcome, time frame, constraints, and at least three KPIs.
  3. A brand has a high last-click conversion rate for branded search but limited budget. Explain what additional evidence should be collected before increasing branded-search spending.

Multiple Choice Questions with Answers

Question 1

Which question is most directly associated with descriptive analytics?

A. What happened to conversion by channel last month?

B. Why did mobile conversion decline after the website release?

C. Which customers are most likely to churn next quarter?

D. Which budget allocation maximizes incremental profit?

Correct Answer: A. What happened to conversion by channel last month?

Question 2

Which statement best describes the purpose of targeting in the STP framework?

A. Dividing the market into groups

B. Selecting segments the organization will serve

C. Designing the product’s physical packaging

D. Assigning credit among advertising touchpoints

Correct Answer: B. Selecting segments the organization will serve

Question 3

A campaign produces revenue after it runs. Which question is specifically causal?

A. How much revenue was recorded?

B. Which customer segment had the highest response?

C. How much additional revenue occurred because of the campaign?

D. Which creative received the most impressions?

Correct Answer: C. How much additional revenue occurred because of the campaign?

Question 4

If 240 purchases result from 6,000 eligible website sessions, what is the conversion rate?

A. 2%

B. 4%

C. 6%

D. 25%

Correct Answer: B. 4%

Question 5

Which statement about a KPI is most accurate?

A. Every metric is automatically a KPI

B. A KPI is a strategically important measure linked to an objective

C. A KPI must always be a financial measure

D. A KPI is the same as a target

Correct Answer: B. A KPI is a strategically important measure linked to an objective

Question 6

Why can last-click attribution mislead a marketing budget decision?

A. It cannot record any online transactions

B. It always assigns equal credit to every channel

C. It may credit the final contact for a purchase that other contacts or existing demand influenced

D. It measures only customer satisfaction

Correct Answer: C. It may credit the final contact for a purchase that other contacts or existing demand influenced

Question 7

Which activity is an example of predictive analytics?

A. Reporting last quarter’s sales

B. Investigating why one region missed its target

C. Estimating which customers are likely to renew

D. Comparing treatment and control outcomes after an experiment

Correct Answer: C. Estimating which customers are likely to renew

Question 8

What is the main purpose of a control group in a marketing experiment?

A. To guarantee that every customer buys

B. To provide an estimate of what would have happened without the intervention

C. To increase the campaign’s media reach

D. To replace the need for defining an outcome

Correct Answer: B. To provide an estimate of what would have happened without the intervention

Question 9

Which measure most directly reflects profitable acquisition when costs and contribution are available?

A. Impressions alone

B. Clicks alone

C. Incremental contribution profit relative to marketing investment

D. Number of creative versions produced

Correct Answer: C. Incremental contribution profit relative to marketing investment

Question 10

Which practice best supports responsible use of marketing AI?

A. Optimizing a single metric without monitoring side effects

B. Using all available personal data regardless of purpose

C. Combining human oversight with documented evaluation, privacy controls, and fairness checks

D. Hiding model limitations from decision-makers

Correct Answer: C. Combining human oversight with documented evaluation, privacy controls, and fairness checks

Marketing Analytics
Chapter 1 of 15