This thesis seeks to contribute to the Chinese taxation literature by researching effective tax rate (ETR), marginal tax rate (MTR) and implicit tax in particular. These areas have been addressed for a number of years within the developed market context, whereas the same research for companies in developing countries is largely non-existent in Western literature. The first topic is the ETR and MTR analysis. The ETR analysis offers an overview of the actual tax burden for listed companies in the People’s Republic of China (PRC), together with the Statutory Tax Rate (STR) analysis, which incorporates the tax structure aspect of tax preferences from 1994 to 2006. In 2002, the State Council stopped unauthorised corporate tax rebate from local government and 2002 became a breaking point of the corporate tax analysis. The ETR and STR analyses reveal that companies benefitted widely from tax preferences before 2002 regardless of their industry or region. However, after 2002, the ETRs increased significantly overall and the industrial and regional ETR differences are much more significant. The tax preferential industries and regions’ companies are still in the lower ETR and STR range, but the non-tax preferential companies’ ETRs and STR increased significantly after 2002. This evidences the effectiveness of Chinese tax preference policies. The MTR estimations are the first Chinese company specific MTR estimations. The MTRs were estimated from 1995 to 2002 and the MTRs results are generally consistent with ETR results, except that the MTR estimations jointly depend on the company Net Operating Loss (NOL) occurrences, income and STR. The second topic is the determinants of ETR. An alternative view of ETR determinants is proposed. It incorporates the accounting-tax conformity theory and identifies a tax rate preference as the new ETR determinant variable to fit the Chinese taxation context. Five explanatory variables are hypothesized in associating company characteristics after controlling the company location, industry and sample period dummy variables. These explanatory variables are tax rate preference, non-operating expenses, investment gain, provision for impairment and government ownership. The ETR determinants model is also examined by OLS regression (cross-sectional), and fixed-effects and random effects regression (panel data analysis). The results show that all of the explanatory variables are statistically significant coefficients with expected signs. The results also demonstrate that the proposed ETR determinant model is superior to previous determinant models. The third topic is implicit tax research. The results are evidence of the existence of implicit tax at the corporate level. The relationships between the company Pre-tax Return of Equity (PTROE) and tax preference variables and other control variables are also examined. The results demonstrate that there is a negative relationship between PTROE and tax rate preference when considering the companies aggregately in a large scale; and there is a positive relationship between PTROE and income related tax preference when considering the companies individually. The contradictory results indicate that in reality, the imperfect market conditions impede the realisation of implicit tax at the individual company level.

One way a multinational corporation can further satisfy its primary objective, which is to maximize shareholder wealth, is to minimize the share of its income that is transferred through taxation to the various sovereign nations within which it does business. The profit maximizing firm attempts to maximize (minimize) taxable income in those jurisdictions where income tax burdens are the least (most) in such a way as to diminish the present value of its global total tax burden. While the US corporate income tax rate has remained relatively stable over the decades since most US income tax rates were last slashed as part of the Tax Reform Act of 1986, across the rest of the world, non-US corporate income tax rates have continued to fall. Even though the US statutory rate was among the lowest corporate income tax rates of any industrialized nation in 1988, by 2008, due to continuing rate decreases around the globe the US rate had become one of the highest corporate income tax rates amongst the G-8. In April of 2012, the US statutory rate as applied to corporate income became the highest among all the Organization for Cooperation and Economic Development (OECD) countries. This study will examine the behavior of option intensive corporations during the late 1990's. Coinciding with the longest recorded economic expansion in the history of the United States and coupled with the so-called "internet bubble" during the second half of the decade, this period of rapid stock price appreciation was also a time when many highly profitable companies faced substantially lower current US tax liabilities due to the large tax deductions resulting from the employee exercise of increasing quantities of non-qualified stock options at substantial gains. Enormous tax losses reported by employee stock option granting firms were sufficient to eliminate not only current US corporate income tax liabilities but also several years of future tax liabilities for some firms. Previous research has documented an increasing proportion of US multinational corporate income recognized in foreign jurisdictions, thereby escaping the relatively high US corporate tax rates until the foreign profits are repatriated back into the US. Perhaps US corporate income tax rates are so high in comparison to equally suitable substitute foreign locations that many firms have relocated their income producing activities to lower taxed jurisdictions abroad. Or it may be that US multinational firms engage in various cross border income shifting techniques to avoid high US corporate income tax rates and reduce their overall global tax burden. Profitable option intensive firms in the late 1990's faced in effect lower US corporate income tax rates due to their extensive employee stock option deductions and resulting net operating loss carry-forwards. It is possible that these firms had more incentive to recognize income domestically than their non-option intensive corporate peers. Using a sample of the largest US firms comprising the NASDAQ-100 index on May 31, 2001, this study found evidence of higher US profitability among NASDAQ-100 multinational firms with the largest deductions resulting from the exercise of options by their employees during the 1997 - 2000 fiscal years suggesting that these firms where more likely to recognize or even generate income within US borders when facing effectively lower US corporate income tax rates. Such an observation has potential public policy implications and contributes to the literature on tax motivated income shifting behavior.

This thesis investigates the determinants of the use of debt and leasing in the UK using a comprehensive measure of debt and leases, in recognition of the link between lease and debt-type financing decisions, based on financial contracting theory and the tax advantage hypothesis. The design of the study takes account three lacunae in our current understanding of this topic. Firstly, despite the fact that the capital structure literature is voluminous, it is perhaps surprising that relatively little research has been carried out on lease finance, given its significant role as a major source of finance for many firms. Secondly, the role of tax in the capital structure decision is unclear. Empirically testing for tax effects is challenging because spurious relationships may exist between the financing decision and many commonly used tax proxies. More importantly, our understanding of the impact of taxes on UK financing decisions is far from complete, especially since several major corporate tax reforms have taken place in the last decade. Thirdly, empirical evidence on capital structure determinants is also voluminous but far from conclusive. Notably, contradictory signs and significance levels are commonly observed. Using the standard regression approach invariably involves identification of the average behaviour of firms, and therefore does not measure diversity across firms. In response to these three major issues, this study employs empirical research methods, namely cross-sectional pooled regression, static and dynamic panel data regression, and quantile regression to analyse a large sample of 361 non-financial firms, drawn from the FTSE 350 and FTSE All-Small indices over the tax years 1995 through 2003. The operating lease data are estimated using the constructive capitalisation method while the simulated before-financing marginal tax rate is used to proxy for the firms’ tax status. The endogeneity of corporate tax status is evident since the use of simple tax proxy, the effective tax rate, leads to a spurious negative relation between debt usage and tax rates. The problem was avoided with a better measure of tax variable that is the simulated before-financing marginal tax rate where it is found that the empirical relationships between the tax factor and debt and leasing are consistent with those theoretical predictions. Furthermore, there is a clear distinction between the effect of taxes on debt and leasing where the firm’s marginal tax status is only relevant when managers make decisions on debt financing. The use of quantile regression method in the present study represents a novel approach in investigating the determinants of the use of debt and leasing. The results reveal that the determinants of debt and leasing are heterogeneous across the whole distribution of firms, consistent with the notion of heterogeneity as promoted by Beattie et al. (2006), but contradicting their claim that the large-scale regression approach cannot measure firms’ diversity. This finding implies that average model results (e.g., from OLS or panel data models) may not apply to the tails of debt and leasing levels, and hence assuming that the determinants of debt and leasing decisions are the same for all firms in the economy is clearly unrealistic. Using the dynamic panel data model, this thesis confirms that debt and leasing are substitutes rather than complements, and that the degree of substitutability is more pronounced among smaller firms, where the degree of information asymmetry is greater. More importantly, the use of a joint specification for debt and leasing improves our understanding of the determinants of the two fixed-claim financing instruments. There is also significant evidence to support the view that firm characteristics affect contracting costs which in turn impact on the choice between alternative forms of finance, namely equity, debt and leasing.