The pedagogy of tax evasion: Its extent and its determinants

This pedagogical note develops a model of individual choice and a comprehensible and functionally realistic framework that explains how the size of the underground economy or the extent of aggregate income tax evasion can be estimated. It also describes three models for estimating the size of the underground economy for the U.S. and provides a formal but easily understood analytical model of determinants of the extent of aggregate income tax evasion. The latter model is useful in serving as the basis for empirical estimates of determinants of income tax evasion and is useful in enhancing student understanding economic behavior through student projects.     

Asymmetric Responses of the Underground Economy to Tax Changes: Evidence From New Zealand Data

This paper considers the relationship between taxes and the size of the New Zealand underground economy. Previous studies indicate that a positive relationship exists in this and certain other countries. This paper addresses the question: 'Is the response of the underground economy to an increase in taxes the same as its response to a decrease in taxes?' We find that although the effect on the underground economy of an upward movement in the effective tax rate is numerically greater than that of a downward tax movement, this difference is not statistically significant.     

Taxes,Risk Aversion,and the Size of the Underground Economy

Non‐parametric regression analysis was used to investigate the relationship between the effective tax rate and the relative size of the underground economy, using New Zealand data. The underlying theoretical framework is established, and it suggests an ambiguous prediction regarding the sign of the relationship we are studying. However, our non‐parametric empirical analysis, which also allows for the non‐stationarity of the time‐series data, produces a positive and ‘S‐shaped’ relationship, and this supports earlier empirical studies that imposed such functional forms. The estimated model is used to simulate the effects of hypothetical tax changes on the size of the New Zealand underground economy, and to draw policy conclusions.     

Are Underground Workers More Likely to be Underground Consumers?

We investigate the impact of working in the underground sector on the demand for underground commodities. Using a tax evasion model with costly information, we show that the presence of a network effect encourages underground workers to purchase underground commodities. The model is estimated using a unique Canadian microdata set for 1993. An increase in underground hours of work has a strong positive effect on the probability of purchasing underground commodities and on the level of expenditures. This relationship has a sizable effect on the impact of tax and enforcement parameters on the level of the underground economy.     

Public capital,deficit financing,and economic growth in a stochastic economy

This paper examines the relationship among deficit-financing fiscal policy, risk and economic growth in a stochastic endogenous growth model with private and public capital. We show that there are positive balanced-growth rate and a debt-to-GDP ratio that depend on deep parameters such as the income tax rate and the standard deviation of the growth rate of private and public capital. Investment and fiscal shocks influence the mean and variance of the growth rate and the debt dependency rate through portfolio changes and capital accumulation. In particular, an increase in the risk of private investment destabilizes the economy and reduces the mean growth rate if the portfolio change is drastic, and this increase in risk increases the debt-to-GDP ratio. In contrast, an increase in the income tax rate stabilizes the economy, increases the mean growth rate, and has a positive or negative effect on the debt-to-GDP ratio according to the ratio of public to private capital if the income tax rate is sufficiently small.     

Currency demand and the growth of the underground economy in Canada, 1991-1995

The extent to which the recent introduction of a value-added tax in Canada contributed to the growth of the underground economy remains controversial. If underground economy growth led to increased currency holdings and shifted the currency demand function, forecasts for the period after the introduction of the tax should tend to underestimate currency holdings. Using a cointegration-based error correction mechanism in vector autoregression models, currency demand is estimated using quarterly data for 1968–1990 and dynamic forecasts are made for 1991–1995. On average, currency demand is underpredicted, but by a small amount. The results are consistent with an increase in the underground economy of between 0.01 and 0.3% of GDP as a result of the new tax. If changes in marginal direct tax rates are considered, the underground economy may have grown between 0.1 and 0.7% of GDP in 1991–1995.     

The hard shadow of the Greek economy: new estimates of the size of the underground economy and its fiscal impact

This article presents new estimates of the Greek underground economy and explores the link between the underground economy and aggregate debt. We show that the Greek underground economy has been underestimated heavily and has been on a rising trend again since Greece adopted the Euro. We also present evidence that the size of the underground economy is positively related to the debt-to-GDP ratio, implying that fighting the underground economy is also conducive to financial and macroeconomic stability. Our results suggest that for our sample of 11 EMU member countries, the loss of the inflation tax as an economic policy instrument had drastic consequences. While the underground economy did not have a statistically significant impact on aggregate debt before the introduction of the Euro, it has pushed up the debt-to-GDP ratio in our sample since.     

Progressive taxation,tax exemption,and corporate liquidation policy

This paper develops a real options model of a firm that operates in continuous time with an infinite horizon. The firm receives stochastic profit flows that are subject to progressive taxation. Tax progression arises from an exogenously given tax exemption threshold that makes the average tax rate increase with the tax base. The firm possesses an option to liquidate its operation, which is optimally exercised when the firm's profit flow reaches an endogenously determined threshold level (the liquidation trigger) from above. We show that the firm's liquidation trigger under progressive taxation increases with either a reduction in the tax exemption threshold or an increase in the corporate income tax rate. Corporate income taxes are thus not neutral when tax schedules are progressive.     

The underground economy and its macroeconomic consequences

This study develops a dynamic general equilibrium model in which optimizing agents evade taxes by operating in the underground economy. The cost to firms of evading taxes is that they find themselves subject to credit rationing from banks. Our model simulations show that in the absence of budgetary flexibility to adjust expenditures, raising tax rates too high drives firms into the underground economy, thereby reducing the tax base. Aggregate investment in the economy is lowered because of credit rationing. Taxes that are too low eliminate the underground economy, but result in unsustainable budget and trade deficits. Thus, the optimal rate of taxation, from a macroeconomic point of view, may lead to some underground activity.     

Optimal Export Taxes, Welfare, Industry Concentration, and Firm Size: A General Equilibrium Analysis

By using an imperfect-competition model, it is shown that an export tax, optimal in partial equilibrium, is upwardly biased and may not be optimal in a general equilibrium setting with free entry/exit. It is shown also that the export tax has an ambiguous impact on firm size. The results of an applied general equilibrium model for the Turkish economy suggest that the export tax estimated with the PE formula is larger by a small factor than the computed export tax. However, the export tax leads to an increase in firm size and, most importantly, to a social welfare loss.     

Factor Endowments,Democracy, and Trade Policy Divergence

We develop a stochastic model of electoral competition in order to study the economic and political determinants of trade policy. We model a small open economy with two tradable goods, each of which is produced using a sector‐specific factor (e.g., land and capital) and another factor that is mobile between these tradable sectors (labor); one nontradable good, which is also produced using a specific factor (skilled labor), and an elected government with the mandate to tax trade flows. The tax revenue is used to provide local public goods that increase the economic agents’ utility. We use this general equilibrium model to explicitly derive the ideal policies of the different socioeconomic groups in society (landlords, industrialists, labor, and skilled workers). We then use those ideal policies to model the individual probabilistic voting behavior of the members of each of these socioeconomic groups. We use this model to shed light on how differences in the comparative advantages of countries explain trade policy divergence between countries as well as trade policy instability within countries. We regard trade policy instability to mean that, in equilibrium, political parties diverge in terms of the political platforms they adopt. We show that in natural resource (land)–abundant economies with very little capital, or in economies that specializes in the production of manufactures, parties tend to converge to the same policy platform, and trade policy is likely to be stable and relatively close to free trade. In contrast, in a natural resource–abundant economy with an important domestic industry that competes with the imports, parties tend to diverge, and trade policy is likely to be more protectionist and unstable.     

Migration,social security,and economic growth

This paper studies the effect of population aging and international migration on economic performance. Fertility is endogenized so that immigrants and natives can have different fertility rates, which provides a more realistic view of policy effects. Fertility is an important determinant to the tax burden of social security since it affects the quantity and quality of future tax payers. We find that introducing immigrants into the economy can reduce the tax burden of social security. If the survival probability of young agents to old age (or the replacement ratio) is high enough, the growth rate of GDP per worker for an economy with international migration will be higher than for a closed economy. Regarding migration policies, our numerical results indicate that economic growth rate of GDP per worker will first decrease then increase as the flow of immigrants increases. Attracting more skilled immigrants will enhance economic growth.     

THE FISCAL DIVIDEND MYTH OF AN INCOME/GST TAX SWITCH*

Reaping a windfall fiscal dividend from the taxation of the ‘underground’ economy's expenditures on ‘legitimate’ commodities is often seen as a significant advantage for a goods and services tax (GST) over an income tax. This claim ignores the changes in prices in the underground economy which would arise from the introduction of a GST. Employing a general equilibrium model which allows for tax evasion, we show that any ‘dividend’ arising from a change in the income tax/GST mix is equivalent to a rise in the income tax rate without a GST.     

Social security, public education and the growth-inequality relationship

We study how the relationship between economic growth and inequality depends upon the levels of funding of two of the largest government programs, public education and social security. We do this in the context of an overlapping generations economy with heterogeneous agents where the government collects a tax on labor income to finance these programs. We show that in our model an increase in government spending on social security reduces income inequality and can have a non-monotonic effect on growth. When the initial level of social security funding is low, as is the case in most poor economies, then its increase will enhance growth. When its funding level is high as is typical for developed countries, we show that its further increase can slow down growth while reducing income inequality. These results obtain regardless of whether the increase in social security funding is financed by a tax increase or by cutting the public education budget. We also find that the effects of increasing the level of public education expenditures or the overall size of the government budget (holding the budget composition fixed) are characterized by similar non-monotonic growth-inequality relationships.     

The learning path of the hidden economy: the tax burden and tax evasion in New Zealand

This paper considers the ‘learning curve’ relationship between the aggregate tax rate and the relative size of the hidden economy in New Zealand. Some simple non-linear models are estimated so that the effects of changes in the effective tax rate on the underground economy can be simulated. This study finds that about half of the hidden activity in New Zealand is a learned response to changing opportunities and constraints in fiscal policy, but this amount varies over the business cycle. Simulating a zero tax rate permits us to discover the ‘natural rate’ of underground and criminal activity. Some partial lessons are drawn for taxation policy in that country.     

The Dynamics of Growth and Income Inequality under Progressive Taxation

This paper develops an endogenous growth model having a progressive income tax structure in which heterogeneous agents, who differ in terms of their rates of time preference, supply labor elastically. We analyze the dynamic adjustment to an increase in progressivity and show that the economy will converge to an equilibrium growth path with nondegenerate distributions of both income and wealth. The role of the endogeneity of labor supply is emphasized and shown to have a major impact on the nature of the transitional path, as a result of the impact of the progressive tax on agents’ work incentives. Our theoretical analysis is supplemented with, and supported by, numerical simulations, which generally match the empirical evidence rather closely. We also show that the responses of the different income groups contrast sharply from one another so that focusing on the economy‐wide average provides an incomplete picture.     

Indeterminacy, underground activities and tax evasion

This paper introduces underground activities and tax evasion into a one-sector dynamic general equilibrium model with aggregate external effects. The model presents a novel mechanism driving the self-fulfilling prophecies, which is characterized by well behaved (downward sloping) labor demand schedules. This mechanism differs from the customary one, and it is complementary to it. Compared to traditional labor market income, the income derived from underground labor activity is subject to a lower expected tax rate when considering both the probability of detection and the evasion penalty. During a belief-driven expansion, the household allocates more time to both traditional and underground labor supply. In equilibrium, this action serves to lower the effective labor tax rate faced by the household, thus providing stimulus to aggregate labor supply so as to make the initial expansion self-fulfilling. The mechanism here is akin to a “regressive tax”; the household's effective tax rate depends negatively on the level of total labor income. We argue that an underground sector, and the associated tax evasion, offer a good economic rationale for a regressive tax rate.     

The macroeconomic effects of fiscal policy in a stochastically growing economy

This paper develops a stochastic model of endogenous growth with productive government expenditure. Herein, we specify the CES production function according to recent empirical evidence. The elasticity of substitution plays a key role in determining macroeconomic performance and the effectiveness of fiscal policy under uncertainty. Results demonstrate that a large elasticity of substitution provides a large expected growth rate and also large volatility of the growth rate. Regarding these effects, the growth-maximizing tax rate and welfare-maximizing tax rate under uncertainty are larger or smaller than those of deterministic economy according to the elasticity of substitution.     

Openness, income-tax progressivity, and inflation

This paper considers a model of an open economy in which the degree of income-tax progressivity influences the interaction among openness, central bank independence, and the inflation rate. Our model suggests that an increase in the progressivity of the tax system induces a smaller response in real output to a change in the price level. This implies that increased income-tax progressivity reduces the equilibrium inflation rate and that the effect of increased income-tax progressivity on inflation is smaller when the central bank places a higher weight on inflation or when there is greater openness. Examination of cross-country inflation data provides empirical support for these key predictions.     

Taxation under oligopoly in a general equilibrium setting

Taxation under oligopoly is analyzed in a general equilibrium setting where the firms are large relative to the size of the economy and maximize the utility of their shareholders. Assuming that preferences are either identical and homothetic or identical and quasi‐linear, then the oligopoly model is an aggregative game, which greatly simplifies the comparative statics for the effects of taxation. This novel analysis of taxation leads to a number of counterintuitive results that challenge conventional wisdom in microeconomics. A lump‐sum tax may increase the price of the oligopolistic good and decrease welfare whereas a profits tax may decrease the price of the oligopolistic good and increase welfare. A profits tax is shown to be superior to a lump‐sum tax. Furthermore, in line with conventional wisdom, total tax revenue is always higher with an ad valorem tax than with a specific tax that leads to the same price for the oligopolistic good.