Abstract
Earnings management has become one of the most widely debated issues in accounting and corporate finance due to its significant implications for financial reporting quality, investor confidence, and corporate valuation. It refers to the deliberate use of accounting judgments, estimation techniques, and discretionary accruals by management to influence reported earnings in order to achieve specific financial reporting objectives while remaining within the boundaries of generally accepted accounting principles. Although earnings management may be employed to communicate private information regarding future prospects, excessive or opportunistic earnings management can distort the true financial position of firms, reduce the credibility of financial statements, mislead investors, and adversely affect market valuation. In Nigeria, increasing regulatory oversight, the adoption of International Financial Reporting Standards (IFRS), strengthened corporate governance mechanisms, and enhanced disclosure requirements have sought to improve financial reporting quality and reduce earnings manipulation among listed companies. Nevertheless, concerns regarding income smoothing, discretionary accounting practices, financial statement manipulation, and managerial opportunism continue to attract the attention of investors, regulators, auditors, and policymakers. The market value of listed companies reflects investors' perceptions of a firm's current performance, future growth prospects, risk profile, and overall value creation potential. Consequently, earnings management practices may significantly influence investors' decisions, share prices, market capitalization, and firm valuation. Although previous studies have examined earnings management and financial performance, empirical evidence regarding the effect of earnings management on the market value of listed companies in Nigeria remains limited and inconclusive. Against this background, this study investigates the effect of earnings management on the market value of listed companies in Nigeria. The study is anchored on Agency Theory, Positive Accounting Theory, and Signaling Theory. Agency Theory posits that managers may engage in earnings management due to conflicts of interest arising from the separation of ownership and control, thereby affecting shareholders' wealth and firm value. Positive Accounting Theory explains that managers select accounting policies and reporting practices that maximize their personal or organizational objectives, particularly in relation to compensation, debt covenants, and political costs. Signaling Theory argues that reported earnings convey important information to investors regarding a firm's financial health and future prospects; however, manipulated earnings may distort these signals and adversely influence market valuation. Collectively, these theoretical perspectives provide a comprehensive framework for explaining the relationship between earnings management and the market value of listed companies in Nigeria. The study adopts an ex post facto research design utilizing secondary data obtained from the audited annual reports, corporate governance reports, and financial statements of companies listed on the Nigerian Exchange Group (NGX). A longitudinal panel data approach covering a ten-year period will be employed to examine the relationship between earnings management and market value over time. Purposive sampling will be used to select listed companies with complete and consistent financial information throughout the study period. Earnings management will be measured using discretionary accruals estimated through the Modified Jones Model, discretionary revenue, and earnings smoothing indicators, while market value will be measured using Tobin's Q, market capitalization, market-to-book ratio, and share price performance. Data analysis will involve descriptive statistics to summarize the characteristics of the study variables, correlation analysis to determine the degree of association among variables, and panel regression techniques, including Fixed Effects and Random Effects models, to estimate the effect of earnings management on market value. The Hausman specification test will determine the most appropriate estimation model, while diagnostic tests including multicollinearity, heteroskedasticity, autocorrelation, stationarity, cross-sectional dependence, endogeneity, normality, and model specification tests will be conducted to ensure the validity, consistency, and robustness of the empirical findings. The study anticipates that earnings management will have a significant effect on the market value of listed companies in Nigeria. Opportunistic earnings management is expected to reduce the credibility of financial statements, increase information asymmetry, weaken investor confidence, and negatively affect market valuation over the long term. While short-term earnings manipulation may temporarily increase share prices and market capitalization by creating favorable investor perce
ptions, persistent earnings management is anticipated to expose firms to regulatory sanctions, reputational damage, declining investor trust, and lower market value when manipulation is detected. Conversely, companies exhibiting high earnings quality, transparent financial reporting, and sound corporate governance practices are expected to enjoy greater investor confidence, improved market valuation, enhanced access to capital, and sustainable shareholder wealth. Consequently, minimizing earnings management practices is expected to contribute significantly to improving market efficiency, investor protection, corporate transparency, and the long-term market value of listed companies in Nigeria. This study is expected to make significant theoretical and empirical contributions to the literature on accounting, corporate finance, financial reporting, and capital market studies by providing comprehensive evidence on the relationship between earnings management and the market value of listed companies in Nigeria. Unlike previous studies that focused primarily on profitability or financial performance, this research specifically examines market value using multiple valuation indicators and a longitudinal panel data approach. The findings will provide valuable insights for the Financial Reporting Council of Nigeria (FRCN), the Securities and Exchange Commission (SEC), the Nigerian Exchange Group (NGX), listed companies, investors, financial analysts, external auditors, professional accounting bodies, policymakers, and academic researchers regarding the implications of earnings management for market valuation, investor confidence, and capital market efficiency. The study will also provide evidence-based recommendations for strengthening corporate governance, enhancing financial reporting quality, improving audit effectiveness, reinforcing regulatory oversight, promoting ethical accounting practices, and fostering a more transparent, efficient, and sustainable Nigerian capital market.
Keywords: Earnings management, market value, listed companies, discretionary accruals, Tobin's Q, financial reporting quality, corporate governance, panel regression, Nigerian Exchange Group (NGX), Nigeria.
