This paper contains an empirical analysis of income tax noncompliance in Switzerland, based on the standard model of tax evasion. Noncompliance is found to be positively related to the marginal tax burden and negatively to the probability of audit, though the latter impact is only weak. There is no evidence of a significant deterrent effect of the penalty tax. The extended model reveals that noncompliance is positively related to inflation. Finally, noncompliance is significantly lower when citizens/taxpayers have direct control over government budgets, whereas the opposite holds when there is no such control.* The paper has benefitted from useful comments by Rodney Beard, Albert Hart, Susanne Krebs, Agnar Sandmo, and participants at various conferences. Werner Pommerehne unexpectedly died of a heart attack on October 8, 1994. With him I lost a most creative teacher, an excellent co-author and a very good friend. This manuscript has been written and revised before his death.

To know the size and development of the hidden or underground economy is important for policy making, mainly because the measures undertaken may be misdirected if they are based on biased official statistics. The hidden economy can be measured by considering indicators. The direct methods are based on voluntary surveys and on tax auditing and other compliance methods. The indirect estimation methods rely on the identification of residuals with respect to income and expenditures, as well as in the labor and money markets. The strengths and weaknesses of each of these measurement approaches are discussed and the resulting estimates of the size of the hidden economy are compared. A different approach to measurement is to look at the determinants leading to the existence and growth of the hidden economy. Finally, the method of “unobserved variables” allows the combination of the two approaches by simultaneously considering the determinants and indicators of the under‐ ground economy. The results show a considerable range of sizes for a given country and year. Though there is a broad range of size estimates, there is general agreement that the hidden economy's size has been growing for all countries over recent decades. Further progress in quantitative knowledge about the hidden economy requires the development of a theoretical model which analyses the interdependencies between the official private sector, the hidden economy, and the public sector.

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SUMMARY This paper deals with the occurrence of fiscal illusion and its effect on public expenditures. Fiscal illusion is here taken to be a systematic misperception by individuals of both the public revenue burden borne by them and the amount of benefit they derive from public expenditures. Taking the revenue structure and public outlays of the 110 largest Swiss cities as an example, it is shown that there is in fact empirical evidence for the existence of fiscal illusion (presently defined for the most part in the literature as a systematic underestimation of fiscal burden) and, as a result, for higher public expenditures when it occurs than when it is absent. By dividing the Swiss cities according to the degree of citizen participation in the making of public decisions, we were able to formulate hypotheses predicting to what degree fiscal burden illusion (understood as systematic underestimation) will occur under each system. These hypotheses have been empirically confirmed. Further analysis of the results has indicated that in cities in which the citizens can only indirectly participate in public decision‐making, the government and public bureaucracy have more freedom to act independent of the wishes of the voters with respect to expenditures, though these are taken more and more into consideration as elections approach. This expenditure behavior and particularly the concrete manner in which expenditures are adjusted to approaching general elections leads us to the conclusion that illusion with respect to the benefit derived from public expenditures also exists.

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