A dissertation in accounting and finance is more than a description of financial data. It is an organised explanation of a research problem. Theory provides the intellectual architecture for that explanation: it identifies relevant concepts, proposes relationships among them, clarifies why those relationships should exist, and guides the selection of evidence and methods.

In accounting and finance, theories are especially important because financial information is produced and used by different parties with different interests, levels of information, incentives and decision rights. Managers may possess more information than shareholders; lenders may impose contractual restrictions; regulators may seek public accountability; investors may interpret disclosures differently; and employees, communities and customers may be affected by corporate decisions. A strong dissertation therefore connects its research question to an appropriate theoretical perspective rather than merely listing theories.

This chapter explains seven influential theories: agency, stakeholder, legitimacy, signalling, institutional, behavioural finance, market efficiency and capital structure theories. It then shows how these perspectives can be used to construct a conceptual framework, formulate research questions and hypotheses, and interpret empirical findings.

Learning objectives

1. Theory, concepts and conceptual frameworks

A theory is a systematic explanation of observed or expected relationships. It normally includes assumptions, concepts, mechanisms and propositions. A concept is an abstract idea, such as earnings quality, financial leverage, legitimacy or investor sentiment. A variable is an observable or measurable representation of a concept. For example, leverage may be operationalised as the debt-to-assets ratio.

A conceptual framework is a structured representation of the relationships that a study intends to investigate. It is not simply a diagram. It should answer four questions:

A useful distinction is between explanatory and descriptive frameworks. A descriptive framework maps the elements of a phenomenon, whereas an explanatory framework proposes mechanisms. For example, a descriptive study may identify the extent of sustainability reporting. An explanatory study may argue that regulatory pressure and legitimacy concerns influence sustainability reporting, with firm size and industry acting as contextual factors.

A framework must not imply causation merely because two variables are displayed together. Causal claims require theoretical justification, suitable research design and credible evidence.

2. Agency theory

Agency theory examines relationships in which one party, the principal, delegates work or decision-making authority to another party, the agent. In a company, shareholders are commonly treated as principals and managers as agents. The separation of ownership and control creates the possibility that managers will pursue personal objectives rather than shareholder interests.

Two problems are central. Information asymmetry occurs when one party has information unavailable to another. Moral hazard occurs when actions cannot be fully observed after a contract has been agreed. Adverse selection occurs when hidden information affects decisions before contracting.

Agency theory predicts that monitoring and bonding mechanisms will develop to reduce agency costs. These mechanisms include audited financial statements, independent directors, executive incentive plans, debt covenants, internal controls and disclosure requirements. Agency costs may be represented conceptually as:

Agency costs = monitoring costs + bonding costs + residual loss

Monitoring costs are expenditures by the principal to observe or constrain the agent. Bonding costs are incurred by the agent to demonstrate commitment to the principal. Residual loss is the remaining reduction in value caused by divergence between the parties’ interests. This expression is conceptual rather than an accounting identity; its components are not always directly measurable.

Agency theory is useful for research on audit quality, earnings management, executive compensation, corporate governance, voluntary disclosure and capital structure. For example, a dissertation may argue that stronger board independence reduces earnings management because independent directors improve monitoring.

Its limitations should also be recognised. The theory can portray managers as excessively self-interested and may understate intrinsic motivation, professional ethics, trust and cooperative behaviour. It may also treat shareholder wealth as the dominant objective even where law or strategy requires broader accountability.

3. Stakeholder theory

Stakeholder theory defines the organisation as accountable to groups that can affect or are affected by its activities. Stakeholders may include shareholders, employees, customers, suppliers, creditors, governments, communities and the natural environment.

The theory has two broad forms. The instrumental form argues that stakeholder management can improve organisational performance by strengthening reputation, cooperation, innovation and risk management. The ethical form argues that stakeholders deserve consideration because they possess legitimate interests, even when doing so does not immediately increase profit.

Stakeholder theory is particularly relevant to sustainability reporting, integrated reporting, corporate social responsibility, employee-related disclosures and environmental accounting. It encourages researchers to ask whose information needs are being served and whose interests may be excluded.

A stakeholder framework may propose that stakeholder pressure increases the breadth or quality of non-financial reporting. Stakeholder salience can be analysed through attributes such as power, legitimacy and urgency. However, measuring these attributes requires careful operational definitions. For example, stakeholder power might be proxied by regulatory authority, purchasing influence or voting rights, but no single proxy is universally valid.

The principal challenge is that stakeholder theory does not always specify how conflicting interests should be prioritised. Reporting to stakeholders may also become symbolic if organisations disclose favourable information while concealing adverse impacts.

4. Legitimacy theory

Legitimacy theory is based on the idea that an organisation depends on a perceived alignment between its activities and the values or expectations of the society in which it operates. A legitimacy gap arises when organisational behaviour, or perceptions of that behaviour, diverges from societal expectations.

Organisations may respond through disclosure, changes in operations, public commitments, community investment or attempts to influence public expectations. Environmental and social reporting can therefore be interpreted not only as information for decision-making but also as a strategy for maintaining social acceptance.

For example, a firm involved in a pollution incident may increase environmental disclosures, publish remediation targets and provide assurance over selected indicators. Legitimacy theory predicts that such disclosures may increase following negative events or during periods of heightened public scrutiny.

Legitimacy theory differs from stakeholder theory in emphasis. Stakeholder theory focuses on relationships with particular groups, whereas legitimacy theory focuses on the broader social contract and the organisation’s general acceptance by society. The theories can be combined when a study investigates how powerful stakeholder groups shape the societal expectations that affect legitimacy.

A limitation is that legitimacy is difficult to observe directly. Researchers often use media attention, public controversy, disclosure changes or reputational ratings as indicators, but these are imperfect proxies. Disclosure may also be substantive, intended to improve actual performance, or symbolic, intended mainly to manage perceptions.

5. Signalling theory

Signalling theory addresses situations in which informed parties communicate information to less-informed parties. In finance, managers may know more about the firm’s future prospects than investors, lenders or potential employees. A disclosure, dividend decision, financing choice or assurance engagement may act as a signal.

For a signal to be credible, it should be difficult or costly for low-quality firms to imitate. For example, a firm with strong internal controls may voluntarily obtain independent assurance over sustainability information because it expects the benefits to exceed the cost. However, voluntary disclosure is not automatically credible: managers may disclose selectively, use vague language or emphasise favourable indicators.

Signalling theory is relevant to voluntary disclosure, dividend policy, audit choice, corporate governance, initial public offerings and financing announcements. A possible framework is that higher expected information asymmetry increases the incentive to disclose, while disclosure credibility is strengthened by external assurance.

The theory requires attention to the receiver of the signal. A signal has meaning only if users can interpret it and if the interpretation affects decisions. Researchers should therefore distinguish between the existence of a disclosure and its perceived credibility or informational value.

6. Institutional theory

Institutional theory explains how organisations are influenced by rules, norms and widely accepted practices. Organisations may adopt similar structures not because those structures are demonstrably efficient, but because conformity provides legitimacy, reduces uncertainty or satisfies powerful institutions.

Pressure	Meaning	Example in accounting
Coercive	Pressure from laws, regulators or powerful funders	Mandatory adoption of reporting standards
Normative	Pressure from professional values and education	Use of recognised audit practices
Mimetic	Imitation under uncertainty	Copying competitors’ sustainability reports

Institutional theory is valuable for studying the adoption of International Financial Reporting Standards, integrated reporting, environmental management systems, corporate governance codes and emerging artificial-intelligence controls.

A key concept is decoupling. An organisation may formally adopt a policy while its day-to-day practices remain largely unchanged. For instance, a company may publish a sophisticated climate policy without establishing effective emissions controls. This distinction helps researchers avoid treating formal compliance as proof of substantive implementation.

Institutional theory can explain convergence among organisations, but it may understate strategic choice and internal conflict. Organisations do not always passively respond to institutions; they may resist, reinterpret or strategically use institutional requirements.

7. Behavioural finance theory

Traditional finance often assumes that investors process information rationally and that markets incorporate information efficiently. Behavioural finance relaxes these assumptions by examining psychological biases and limits to judgment.

Behavioural finance is useful in research on trading volume, market anomalies, financial reporting interpretation, fraud susceptibility, budgeting and investment decisions. It can also help explain why investors may respond differently to identical disclosures depending on framing, prior beliefs or recent market performance.

Behavioural explanations should be operationalised carefully. A claim that investors are biased should be supported by observable behaviour, experimental evidence, survey responses or market patterns, not merely by the fact that an outcome was unexpected.

The theory does not imply that all investors are irrational at all times. Professional incentives, learning, arbitrage and competition may reduce some biases. Behavioural finance is therefore most persuasive when it specifies the conditions under which a bias is likely to arise.

8. Market efficiency theory

The efficient market hypothesis proposes that security prices reflect available information. The theory is commonly discussed in three forms:

Form	Information reflected in prices
Weak	Historical prices and trading information
Semi-strong	All publicly available information
Strong	Public and private information

Under the semi-strong form, a public accounting announcement should be incorporated rapidly into prices, leaving no predictable abnormal return after accounting for risk and transaction costs.

where AR_i,t is the abnormal return for security i at time t, R_i,t is its actual return, and E(R_i,t | X_t) is the expected return conditional on information set X_t. The formula is applicable in event studies when a defensible expected-return model and event window are specified. Returns must be measured consistently, usually as percentages or decimals over the same period.

The hypothesis that an accounting announcement affects value may be examined by testing whether CAR differs significantly from zero. A finding of no abnormal return does not prove that information is irrelevant; the event may have been anticipated, measured poorly or confounded by other news.

Market efficiency is challenged by anomalies, limits to arbitrage, transaction costs and behavioural biases. It remains valuable as a benchmark against which alternative explanations can be evaluated.

9. Capital structure theory

Capital structure theory examines the mix of debt and equity used to finance an organisation. The Modigliani–Miller proposition, under highly restrictive assumptions including frictionless markets, no taxes, no bankruptcy costs and symmetric information, states that financing mix does not affect firm value. Real-world theories relax these assumptions.

The trade-off theory proposes that firms balance the tax advantages of debt against expected financial distress and agency costs. A simplified conceptual expression is:

Firm value with leverage = unlevered firm value + present value of tax benefits − present value of expected distress costs

This is not a complete valuation equation unless the relevant cash flows, tax rates, discount rates and distress probabilities are specified.

The pecking-order theory argues that information asymmetry creates a financing hierarchy: firms generally prefer internal funds, then debt, and issue equity as a last resort. Equity issuance may be interpreted as a signal that managers believe shares are overvalued, although this interpretation is context-dependent.

Agency perspectives emphasise conflicts between managers and shareholders, and between shareholders and creditors. Debt can discipline managers by requiring regular payments, but excessive debt can encourage risk shifting or underinvestment.

Both numerator and denominator must be measured on a consistent accounting basis and for the same reporting date. Researchers should specify whether debt means interest-bearing debt, total liabilities or another defined category.

Capital structure theory supports studies of financing decisions, debt covenants, dividend policy, investment and financial distress. It also demonstrates why a conceptual framework may need several theories: agency theory may explain governance effects, signalling theory may explain financing announcements, and trade-off theory may explain the level of debt.

10. Integrating theories into a conceptual framework

Theories should be selected because they explain the research problem, not because they are famous. A practical process is as follows.

Step 1: Define the phenomenon and unit of analysis

Specify whether the unit is a firm, annual report, investor, manager, transaction or country. A framework about firm-level reporting cannot be tested using only individual-level psychological measures without an appropriate aggregation strategy.

Step 2: Identify the main outcome

Define the dependent concept precisely. “Reporting quality” may refer to completeness, accuracy, comparability, readability, timeliness or assurance. Each dimension requires different measures.

Step 3: Select a primary theory

Choose the theory that best explains the central mechanism. Agency theory may be primary for monitoring and earnings management; legitimacy theory may be primary for environmental disclosure after controversy; behavioural finance may be primary for investor judgment.

Step 4: Add supporting theories cautiously

A second theory is justified when it explains a different mechanism or boundary condition. Theories should not be combined merely to increase the number of citations. Their assumptions should be compatible or their tension should become an explicit research issue.

Step 5: Define variables and expected directions

For each relationship, state the mechanism and expected direction. For example: “Greater board independence is expected to be associated with lower earnings management because independent directors strengthen monitoring.” The relationship may be positive, negative, non-linear or conditional.

Step 6: Identify mediators, moderators and controls

A study might propose that regulatory pressure increases disclosure through legitimacy concerns, while firm size moderates the relationship because larger firms face greater scrutiny. Controls such as profitability, industry and leverage should be included only when theoretically justified.

Step 7: Align theory, method and evidence

A longitudinal design may be appropriate for changes in disclosure following regulation. An event study may be appropriate for market reactions. Interviews may be appropriate for understanding how managers interpret institutional pressure. Methodological choice should follow the research question rather than the availability of a familiar dataset.

11. Applied case: sustainability reporting after an environmental incident

This is an illustrative fictional case. GreenRiver Utilities is a listed electricity provider. After a spill from one of its facilities, media coverage increases, a regulatory investigation begins and local residents demand information. The company subsequently publishes a lengthy sustainability report and obtains limited external assurance over selected environmental indicators.

Problem

A researcher wants to explain whether the new reporting reflects genuine accountability or an attempt to restore public acceptance.

Theoretical analysis

Legitimacy theory predicts increased disclosure after a legitimacy-threatening event. Stakeholder theory predicts greater attention to regulators, communities, investors and customers because these groups can affect the firm. Signalling theory suggests that external assurance may be intended to increase the credibility of the company’s claims. Institutional theory suggests that the report may follow industry templates or regulatory expectations. Agency theory may explain the role of assurance in reducing information asymmetry between managers and investors.

Conceptual framework

The environmental incident is the triggering event. Media scrutiny and regulatory pressure are explanatory factors. Legitimacy concerns are a mediating mechanism. Reporting quantity, reporting specificity and assurance are outcomes. Firm size, prior reporting practices and industry regulation are contextual controls. A qualitative content analysis could compare reports before and after the incident, while interviews could investigate managerial motives. A market event study could separately examine investor reaction, but it would not by itself establish whether environmental performance improved.

Possible propositions

Outcome and learning points

The case illustrates that one event can be interpreted through multiple theories, but each theory asks a different question. Legitimacy theory addresses social acceptance; stakeholder theory addresses affected groups; signalling theory addresses information credibility; institutional theory addresses conformity; and agency theory addresses monitoring. A good dissertation makes these distinctions explicit and defines evidence capable of testing each claim.

12. Critical issues, ethics and contemporary developments

A theoretical framework can create ethical risks if it treats disclosure as a purely strategic tool. Selective reporting may mislead investors and communities, while poorly designed performance measures can encourage managers to improve reported outcomes without improving underlying conditions. Researchers must distinguish correlation from causation, protect interview participants and report results honestly, including findings that do not support the proposed hypotheses.

Regulation increasingly requires firms to provide climate, sustainability, governance and risk information. Technology is changing how such information is produced. Artificial intelligence can classify disclosures, detect unusual journal entries, analyse textual sentiment and identify patterns across large datasets. However, AI-generated measures may reproduce classification errors, lack transparency or mistake polished language for reliable performance. Human judgement, documentation, data governance and validation remain essential.

Contemporary research also increasingly combines financial and non-financial information. Integrated reporting, climate-risk disclosure, digital assets, algorithmic trading and platform business models challenge traditional boundaries between accounting, finance and organisational theory. Students should therefore treat theories as adaptable analytical tools rather than fixed explanations.

Best practice in framework development includes defining constructs before selecting proxies, citing original and recent scholarly sources, explaining expected directions, acknowledging rival explanations, aligning hypotheses with methods and distinguishing theoretical contribution from managerial recommendation.

Chapter Summary

Theories provide explanations for why accounting and finance phenomena occur. Agency theory focuses on delegated authority, information asymmetry and monitoring. Stakeholder theory examines responsibilities to affected groups, while legitimacy theory explains organisational efforts to maintain social acceptance. Signalling theory analyses communication between informed and less-informed parties. Institutional theory explains coercive, normative and mimetic pressures and the possibility of decoupling. Behavioural finance identifies psychological influences on financial decisions, whereas market efficiency provides a benchmark for evaluating how information affects prices. Capital structure theories explain financing choices through taxes, distress costs, information asymmetry and agency conflicts.

A conceptual framework connects concepts through theoretically justified relationships. Its quality depends on clear definitions, suitable operationalisation, appropriate methods and recognition of rival explanations. Strong dissertations use theories selectively, explain mechanisms, identify boundary conditions and interpret evidence with caution.

Key Terms

Agency theory: Theory concerning conflicts and contracts between principals and agents.

Moral hazard: Risk that an agent changes behaviour when actions are difficult to observe.

Stakeholder theory: Perspective that organisations have responsibilities to affected groups.

Legitimacy theory: Theory that organisations seek alignment with societal expectations.

Legitimacy gap: Perceived difference between organisational conduct and social expectations.

Signalling theory: Theory concerning communication by informed parties to less-informed parties.

Institutional theory: Theory explaining the influence of rules, norms and accepted practices.

Coercive pressure: Pressure arising from laws, regulation or powerful authorities.

Decoupling: Separation between formal adoption and actual organisational practice.

Behavioural finance: Study of psychological influences on financial decisions and markets.

Market efficiency: Proposition that security prices reflect specified information.

Abnormal return: Actual return minus an appropriately estimated expected return.

Capital structure: The composition of an organisation’s debt and equity financing.

Trade-off theory: Theory balancing debt benefits against financial distress and related costs.

Pecking-order theory: Theory proposing preferences for internal finance, debt and then equity.

Conceptual framework: Organised representation of concepts and proposed relationships in a study.

Operationalisation: Translation of an abstract concept into observable measures.

Review Questions

5 Short Answer Questions

5 Long Answer Questions

3 Analytical / Application Questions

Multiple Choice Questions with Answers

Question 1

Correct Answer: A. Conflict arising from separation of ownership and control

Question 2

Which form of institutional pressure results from professional values and education?

Question 3

Correct Answer: C. Perceived organisational conduct diverges from societal expectations

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

In a conceptual framework, a variable that changes the strength of a relationship is called a:

Question 10

Correct Answer: C. A difference between formal adoption and actual implementation

Chapter 3 Theoretical and Conceptual Foundations

Theoretical and Conceptual Foundations

Introduction and context