This paper attempts to extend the theoretical and empirical methodology employed in previous literature, by proposing a utility maximization process to estimate the optimal tax revenue from a sample of 30 countries. It is shown that an optimal tax system is defined solely by two crucial determining factors: The productive capacity of the country (GDP) and consumers' preferences (consumption spending). All the other variables can be disregarded, as macroeconomic determinants (GDP, consumption) tend to capture the impact of all the remaining factors on tax revenue. It is also shown that our utility maximization method generates tax-effort indices which do not differ significantly from those of IMF and World Bank studies. The actual tax burden for most of the sample countries is shown to be below its optimal level. As expected, the tax-effort performance of each of the sample countries appears to be affected by the variety of approaches employed throughout the text.
In the present study, we attempt to investigate the determinants of the effective corporate tax rate of companies of the European Union (EU) discriminating between northern and southern economies. We adopt in our analysis the period after the outbreak of the crisis in the Eurozone up today including some years before 2009 in the assessed period. Our empirical investigation is based on three alternative approaches to effective income tax rate based on accounting information. We investigate the determinants of ECITR assessing two sub-samples of firms from all the aforementioned industrial sectors for 16 member countries of Europe. The first sub-sample consists of firms from 12 member countries of "North" European Union and the second sub-sample consists of firms from 4 member countries of "South" European Union. The analysis covers the period 2004-2016. Estimation results point out that the effective corporate income tax rate is variously affected by firm-specific determining factors for both northern and southern economies. The relation between ECITR and determining factors is ascertained to be less significant (sensitive) during the pre-crisis period in comparison with the respective empirical findings after the outburst of the economic crisis in the European Union. Empirical findings indicate that effective corporate income tax rate is more vulnerable to financial leverage for southern economies in comparison to the northern economies signaling financing structure differences between the two EU-country groups. Finally, there is evidence that there is an indisputable and positive coexistence between business profitability and tax burden.
A central issue in Public Economics is the appropriate design of a tax system that will succeed in reconciling the concepts of equity and efficiency. In the present study, the standard assumption of the household's utility being dependent on consumption (income) and labour (leisure) is adopted to arrive at a decision as to the nature of distortions and the fiscal measures required to eliminate them. The comparison of a utility function (with consumption and labour being treated as exogenous), that causes no distortions, with another utility function (with consumption depending on indirect taxes and labour supply on income taxes), that generates distortions, allows us to carry out a number of econometric, mathematical, and empirical tests, designed to redress the balance between the MRS and the MRT and to eliminate the distortions originating in the labour market and/or the commodities market.
The standard methodology on tax‐effort (i.e., the ratio of actual tax revenue to its optimal level) is to run a regression of actual tax revenue on countries’ specific (macroeconomic, demographic, geographical, political, social, and institutional) variables. The resulting predicted (fitted) values are then taken to represent the optimal (desired or maximum) level of tax revenue. The crucial issue of tracing out how the optimal tax revenue should be allocated to the fiscal objectives (equity, efficiency) does not seem to be of any interest to the researchers on tax‐effort. The present paper argues that the standard methodology is not without faults and needs revising. We demonstrate that an optimal tax system can be safely derived from maximizing a utility function with respect to (in)direct tax rates. The manipulation of the first‐order conditions, using a novel mathematical module, leads to an infinite number of optimal direct–indirect tax rates. The selection of the optimal mix of these tax rates is dependent on the country‐specific households’ preferences over equity/efficiency, as they are formulated by voters’ volition in election periods. A simulation procedure helps understanding how the optimal tax revenue is chosen and how it can be optimally allocated to fiscal objectives, in the context of a panel data set including a large number of developed and developing countries. Throughout our text, the optimal tax revenue is defined as the sum of the products of the optimal (in)direct tax rates and their corresponding tax bases. In the simple Arrow–Debreu economy, the above sum is shown to be equal to the difference between income and consumption.
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