The effects of tax rate changes on tax bases and the marginal cost of public funds for Canadian provincial governments

The efficiency losses from taxation vary directly with the responsiveness of a government??s tax bases to tax-rate increases. We estimate the dynamic responses of tax bases to changes in tax rates using aggregate panel data from Canadian provinces over the period 1972 to 2006. Our preferred empirical results indicate that a one percentage point increase in corporate income, personal income, and sales tax rates is associated with a 3.67, 0.76, and 1.17 percent reduction in their respective tax bases in the short run. The corresponding long-run tax base semi-elasticity estimates are higher: ?13.60, ?3.63, and ?3.18, respectively. We use the tax base elasticity estimates to calculate the marginal cost of public funds (MCF) for the provinces?? three major taxes. Our computations indicate that the corporate income had the highest MCF and that the sales tax had the lowest MCF in all provinces in 2006. The MCF for the personal income tax ranged from 1.44 in Alberta to 3.81 in Quebec. Our results imply that there would have been significant welfare gains in 2006 from reductions in provincial corporate income tax rates. Our computations also indicate that the equalization grant formula may reduce the perceived MCF of the provinces that receive these grants, and that increases in provincial corporate and personal income taxes can cause significant reductions in federal tax revenues.     

Profit shifting and tax-rate uncertainty

Using firm-level data for 1,084 parent firms in 24 countries and for 9,497 subsidiaries in 54 countries, we show that tax-motivated profit shifting is larger among subsidiaries in countries that have stable corporate tax rates over time. Our findings further suggest that firms move away from transfer pricing and toward intragroup debt shifting that has lower adjustment costs. Our results are robust to several identification methods and respecifications, and they highlight the important role of tax-rate uncertainty in the profit-shifting decision while pointing to an adjustment away from more costly transfer pricing and toward debt shifting.     

Using Financial Accounting Data to Examine the Effect of Foreign Operations Located in Tax Havens and Other Countries on U.S. Multinational Firms' Tax Rates

This paper investigates the effect tax havens and other foreign jurisdictions have on the income tax rates of multinational firms based in the United States. We develop a new regression methodology using financial accounting data to estimate the average worldwide, federal, and foreign tax rates on worldwide, federal, and foreign pretax book income for a large sample of U.S. firms with and without tax haven operations. We find that on average U.S. firms that disclosed material operations in at least one tax haven country have a worldwide tax burden on worldwide income that is approximately 1.5 percentage points lower than firms without operations in at least one tax haven country. Our results also show that U.S. firms face a 4.4% current federal tax rate on foreign income whether or not they have tax haven operations. Finally, we find that U.S. firms with operations in some tax haven countries have higher federal tax rates on foreign income than other firms. This result suggests that in some cases, tax haven operations may increase U.S. tax collections at the expense of foreign country tax collections.     

Minimum tax legislation and its effect on corporate financial reporting: A comparative analysis between US and India: a discussion

In this study, the authors investigate imposing a minimum alternative tax (MAT) on Indian corporations during the 1996–1997 budget years. The authors have two objectives: to assess the new legislation's impact on tax revenue, and to determine how corporations responded to its imposition because of its explicit link to financial reporting. They first assess whether, on average, firms with low estimated tax rates before the imposition paid higher taxes after imposition and find, overall, that corporations paid, in total, a greater amount of their income in taxes. They also find that the largest firms in their sample experienced a smaller increase in their effective tax rates than smaller firms did. Next, they assess whether MAT-affected firms altered their financial statement reporting to reduce exposure to the MAT. Specifically, they assess whether a greater portion of MAT-affected firms changed their financial statement depreciation policies than non-MAT-affected firms. They report that, for their sample, a significant number of MAT-affected firms increased their depreciation rate after MAT imposition. The proportion of non-MAT-affected firms changing depreciation rates after imposition was not significant. They also partition MAT- and non-MAT-affected firms on increasing or decreasing book profit and find that MAT-affected firms made proportionally more changes. The authors conclude that the MAT appeared to have increased horizontal equity among taxpayers in India, but its tax revenue enhancement potential is limited by its scope, limited applicability, and avoidance behavior by affected corporations. My comments are directed at what I perceive to be motivational and methodological issues in the paper and the conclusions we can draw from the current representation.     

Tax reform, the informal economy, and bank financing of capital formation

This paper develops a model that relates businesses’ entry into the underground economy to tax rates and the need to access the banking system. The model uses a dynamic approach in which both firms and banks optimize and in which the benefits to a firm of accessing the banking system are endogenous. A firm compares the return to capital with the marginal tax rate on capital income and uses the difference to determine how much of the tax to pay. At the same time, banks use a firm’s capital tax payments, combined with the capital tax rate to obtain an estimate of the firm’s minimum capital value. If the firm pays at least some taxes then it will have access to the banking system, which will allow it to finance investment. If the firm pays no taxes, then it cannot access the banks and cannot invest. We compare the equilibria resulting from tax compliance and tax evasion. We calibrate the model to a highly stylized version of the Russian economy, and analyze the effect of potential tax changes on the underground economy. We compute a dynamic equilibrium for our model, and note that it tracks the path of certain macroeconomic variables of the Russian economy (GDP, budget and trade balances, price level and interest rate) with some accuracy for the years 2001–2008. We are unable to track the underground economy, as this data is unobservable. We then carry out a series of counterfactual simulations, first asking if non-capital intensive firms have an incentive to evade taxes under existing value added tax rates. We find that they do, and that the incentive would have been greatly reduced if the value added tax rate had been selectively reduced for the non-capital intensive sectors. We then ask what the effect would be if the corporate tax rate were raised on capital intensive sectors. The simulations indicate that the capital intensive sectors would not increase their entry into the underground economy.     

Ownership Concentration,State Ownership,and Effective Tax Rates: Evidence from China’s Listed Firms*

This paper examines the effect of ownership concentration and state ownership on the tax reporting practices of China’s publicly listed firms. I argue that ownership concentration and state ownership are important for tax reporting practices in China because listed firms have high ownership concentrations and high levels of state ownership. Using a sample of 758 listed Chinese firms over the 1998–2008 time period, I find that firms with concentrated share ownership have lower effective tax rates. I also find that firms whose largest shareholders are government‐related have higher effective tax rates compared to firms whose largest shareholders are nongovernment related. In other words, the nature of the largest shareholder (government vs. nongovernment) matters. I also show that ownership‐concentrated firms are able to achieve preferential statutory tax rates compared to firms with low ownership concentration regardless of the identity of the largest shareholder.     

Anti profit-shifting rules and foreign direct investment

This paper explores the effects of unilateral tax provisions aimed at restricting multinationals’ tax planning on foreign direct investment (FDI). Using a unique dataset which allows us to observe the worldwide activities of a large panel of multinational firms, we test how limitations of interest tax deductibility, so-called thin-capitalization rules, and regulations of transfer pricing by the host country affect investment and employment of foreign subsidiaries. The results indicate that introducing a typical thin-capitalization rule or making it more tight exerts significant adverse effects on FDI and employment in high-tax countries. Moreover, in countries that impose thin-capitalization rules, the tax-rate sensitivity of FDI is increased. Regulations of transfer pricing, however, are not found to exert significant effects on FDI or employment.     

Are Multinational Corporate Tax Rules as Important as Tax Rates?

Previous research has documented the influence of statutory tax rates on international firms' effective tax rates, or ETRs. We add to this body of research by examining common factors of the income tax base, which affects ETRs. Specifically, this study examines the determinants of effective tax rates for publicly traded companies based in European Union (EU) countries. The time period examined is after 2004, when all EU firms were required to use standardized accounting principles under International Financial Reporting Standards (IFRS). We find that, across EU countries, such factors are relatively consistent with factors found in studies of U.S. companies' effective tax rates, which include inventory, leverage, depreciation tax shield, and R&D intensity. We also find that the presence of country book-tax conformity rules increases effective rates. Importantly, our finding that such tax base (or rule) effects are at least as important as rate effects adds to the international debate about uneven tax structures around the globe.     

Commitment and the time structure of taxation of foreign direct investment

The paper examines the role of commitment to future tax policy as an explanation for tax incentives for foreign direct investment that take the form of rates that increase over time. Both commitment and non-commitment to future tax rates are analyzed using a two-period model with investment determined endogenously in the first period. Without commitment, it is shown that tax rates may increase or decrease with time depending on the relative values of the firms' outside option each period of investing elsewhere in the world and on the responsiveness of investment to a change in the tax rate. With commitment, the time structure of tax rates is shown to depend on the relative rates at which firms and governments discount the future.This is a revised version of a chapter of my Ph.D. dissertation completed at Queen's University (1993). I am grateful to my supervisors Robin Boadway and Beverly Lapham for comments on an earlier version. I also thank Sam Bucovetsky and two anonymous referees for comments and suggestions.     

World dividends and tax shocks

For a sample of 28,895 firms across 30 countries and 29 years, there is a negative relation between dividend tax rates and dividend payout. Firms increase dividend payout in response to both absolute and relative (to capital gains tax rates) decreases in dividend tax rates. This negative relation is robust to both increases and decreases and both shocks and continuous variation in dividend tax rates and affects both dividend payer status and dividend payout level. However, dividend payers do not increase dividend payout levels following decreases in dividend tax rates. The negative relation between dividend tax rates and dividend payout is stronger in countries and firms with better governance and suggests a dividend taxation elasticity of −0.45.     

Capital gains tax,supply‐driven trading and ownership structure: direct evidence of the lock‐in effect

This study investigates the effect of differential capital gains tax rates on investor trading and share prices in a unique market setting that facilitates the resolution of conflicting prior evidence of holding period tax incentives. In particular, we examine whether the concessionary tax treatment of long‐term capital gains increases the supply of shares that qualify for long‐term status, thereby causing downward price pressure. We find evidence of abnormal seller‐initiated trading following the 12‐month anniversary of listing for IPO firms that appreciate in price (‘winners’) and report no such evidence for firms that decline in price (‘losers’). Consistent with the tax concessions being greater for individual than institutional investors, we report that abnormal seller‐initiated trading is mitigated by higher levels of ownership by institutional investors. We also report limited evidence, for winners, of declining share prices upon qualifying for long‐term tax status.     

Corporate Social Responsibility,Tax Aggressiveness,and Firm Market Value

This paper examines the relationship of corporate social responsibility (CSR), tax aggressiveness, and firm market value. An economic model has been developed to show that profit‐maximization firms are willing to incur additional costs in CSR, such as paying more taxes, as long as they can differentiate their products from non‐CSR firms, and that socially conscious consumers will buy products from CSR firms at prices higher than those of non‐CSR firms. The empirical study in this paper indicates that the higher the CSR ranking of a firm, the less likely a firm is to engage in tax aggressiveness. It also indicates that a reputation of higher CSR will enhance firm market value. Using Canadian companies listed in the S&P/TSX 60 index, I find that both firms’ five‐year effective tax rates and annual effective tax rates are positively associated with their overall CSR scores as well as with their social scores. Firms’ five‐year effective tax rates are also positively associated with their governance index. I also find that firms’ overall CSR ranking and governance scores are positively associated with their market value.     

Taxing multi-nationals under union wage bargaining

This paper investigates corporate taxation under separate accounting (SA) and formula apportionment (FA) in a model with union wage bargaining and multi-national firms. Under SA, we find that increases in the corporate tax rate raise the wage level of domestic workers, while they lower the remuneration of foreign workers. The main insight emerging from a tax competition game is that the endogenous wage level gives rise to an ambiguous fiscal externality, which may dampen the race-to-the-bottom in corporate tax rates. A switch to a tax system with FA principles reverses the impact of corporate taxes on negotiated wages. While increases in the corporate tax rate reduce domestic wages, they raise the wage level of foreign workers. In a tax competition game, the endogenous wage level gives rise to a positive fiscal externality that enforces the race-to-the-bottom in corporate tax rates.     

Debt and taxes: Evidence from the real estate industry

Compelling empirical evidence documenting a material effect of corporate taxes on leverage decisions is limited, in part because of difficulties in constructing an effective proxy for the firm's tax benefit of debt. We examine leverage decisions across taxable and nontaxable real estate firms—firms for which we can measure the relative tax benefit of debt with little error. The tax hypothesis implies that for firms with similar asset portfolios, taxable firms should have more debt than their nontaxable counterparts. Consistent with this, leverage ratios of taxable real estate firms are higher than their nontaxable counterparts, but the magnitude of this difference is at most one-half of that implied by studies that employ simulated marginal tax rates.     

On the optimal timing of capital taxes

For many kinds of capital, depreciation rates change systematically with the age of the capital. Consider an example that captures essential aspects of human capital, both regarding its accumulation and its depreciation: a worker obtains knowledge in period 0, then uses this knowledge in production in periods 1 and 2, and thereafter retires. Here, depreciation accelerates: it occurs at a 100% rate after period 2, and at a lower (perhaps zero) rate before that. The present paper analyzes the implications of non-constant depreciation rates for the optimal timing of taxes on capital income. The main finding is that under natural assumptions, the path of tax rates over time must be oscillatory. Oscillatory tax rates are optimal when depreciation rates accelerate with the age of the capital (as in the above example), and provided that the government can commit to the path of future tax rates but cannot apply different tax rates in a given year to different vintages of capital.     

Income repatriation decision for multinational corporations: Tax issues

This paper analyzes the existing asymmetry in the US corporate tax law governing the determination of foreign tax credits earned by US firms with foreign subsidiaries. The existing asymmetry results in the US government de facto holding foreign currency put options against US firms with foreign subsidiaries. Combined with the exchange rate volatility, this tax law asymmetry reduces the effective foreign after-tax rate of return and, thus, makes it profitable for US firms to repatriate their foreign source income earlier even when the foreign after-tax rate of return is higher than the domestic rate. Although this paper identifies this asymmetry in the tax law and analyzes its potential effect on the timing of foreign source income repatriation, it is an open question as to the economic significance of this tax code feature provided the firms’ ability to curry the unused tax credit forward for up to 10 years.     

Can firm-specific dividend drop-off ratios be used to infer shareholder marginal tax rates?

In a seminal study, Elton and Gruber (1970) argue that ex-dividend day pricing can be used to infer marginal tax rates of shareholders. We examine ex-dividend day pricing for individual firms and ask whether their CFOs could use the history of a firm's ex-dividend price-drop ratios to infer reasonable estimates of shareholders’ marginal tax rates. We use TAQ data for 1,124 US firms that have at least 30 ex-dividend days during the period August 1993 to October 2012. Our results show that ex-dividend day pricing is so noisy as to prohibit sensible estimates of shareholders’ marginal tax rates.     

Bilateral internal debt financing and tax planning of multinational firms

This paper examines how taxes affect bilateral internal debt financing among foreign entities of multinational firms. Our data allows us to construct precise bilateral tax-rate differentials between borrowers and lenders of internal debt, which are found to be positively related to internal debt financing of borrowing entities. Compared with previous studies, the estimated tax-elasticity of internal debt exceeds earlier findings by far, most probably accruing to the bilateral specification of tax incentives. Additional investigations on whether and to what extent countries effectively impose anti-tax-avoidance measures show that thin-capitalization rules in host countries are particularly effective.     

Debt, Leases, Taxes, and the Endogeneity of Corporate Tax Status

We provide evidence that corporate tax status is endogenous to financing decisions, which induces a spurious relation between measures of financial policy and many commonly used tax proxies. Using a forward-looking estimate of before-financing corporate marginal tax rates, we document a negative relation between operating leases and tax rates, and a positive relation between debt levels and tax rates. This is the first unambiguous evidence supporting the hypothesis that low tax rate firms lease more, and have lower debt levels, than high tax rate firms.     

Analyzing the Tax Benefits from Employee Stock Options

Employees tend to exercise stock options when corporate taxable income is high, shifting corporate tax deductions to years with higher tax rates. If firms paid employees the same dollar value in wages instead of stock options, the average annual tax bill for large U.S. companies would increase by $12.6 million, or 9.8%. These direct tax benefits of options increase in the convexity of the tax function. In addition, profitable firms can realize indirect tax benefits because stock options increase debt capacity. Although tax minimization is probably not the main motive for option grants, firms with larger potential tax benefits grant more options.