Monetary policy with uncertain parameters

In a simple dynamic macroeconomic model, it is shown that uncertainty about structural parameters does not necessarily lead to more cautious monetary policy, refining the accepted wisdom concerning the effects of parameter uncertainty on optimal policy. In particular, when there is uncertainty about the persistence of inflation, it may be optimal for the central bank to respond more aggressively to shocks than under certainty equivalence, since the central bank this way reduces uncertainty about the future development of inflation. Uncertainty about other parameters, in contrast, acts to dampen the policy response. JEL Classification: E43, E52

School choice and student achievement – new evidence on open-enrolment

This paper studies the effects of open-enrolment on student performance in the context of an admission reform in Stockholm. Before 2000, students had priority to the public upper secondary school situated closest to where they lived, but from the fall of 2000 and onwards, admission is based on grades only. The reform imposed strong incentives for school competition: all students can apply to all schools, there is no targeting of students to schools, and funding follows the students. It is shown that the students in Stockholm perform no better with increased choice availability. In fact, high ability students seem to perform worse after the reform.School choice; open-enrolment

Robust monetary policy in the New-Keynesian framework

We study the effects of model uncertainty in a simple New-Keynesian model using robust control techniques. Due to the simple model structure, we are able to find closed-form solutions for the robust control problem, analysing both instrument rules and targeting rules under different timing assumptions. In all cases but one, an increased preference for robustness makes monetary policy respond more aggressively to cost shocks but leaves the response to demand shocks unchanged. As a consequence, inflation is less volatile and output is more volatile than under a non-robust policy. Under one particular timing assumption, however, increasing the preference for robustness has no effect on the optimal targeting rule (nor on the economy).Knightian uncertainty; model uncertainty; robust control; min-max policies

Estimating dynamic income responses to tax reforms: Swedish evidence

We study income responses to income tax changes by using a large panel of Swedish tax payers over the period 1991–2002. Changes in statutory tax rates as well as discretionary changes in tax bracket thresholds provide exogenous variations in tax rates that can be used to identify income responses. We estimate dynamic income models which allow us to distinguish between short-run and long-run effects in a straightforward fashion. For men, the estimates of the long-run elasticity of income with respect to the net-of-tax rate hover in a range between 0.10 and 0.30. The estimates for women are imprecise and statistically insignificant. We simulate the fiscal consequences of a tax reform that reduces the top marginal tax rate by five percentage points. Such a reform may have negligible effects on tax revenues even for relatively small elasticities when the interactions between income taxes and other taxes are taken into account.Marginal tax rates; progressive taxes; earned income; tax reform

Robust monetary policy in a small open economy

This paper studies how a central bank’s preference for robustness against model misspecification affects the design of monetary policy in a New-Keynesian model of a small open economy. Due to the simple model structure, we are able to solve analytically solve the optimal robust policy rule, and separately ana-lyze the effects of robustness against misspecification concerning the determination of inflation, output and the exchange rate. We show that an increased central bank preference for robustness makes monetary policy respond more aggressively or more cautiously to shocks, depending on the type of shock and the source of misspecification.Knightian uncertainty; model uncertainty; robust control; min-max policies

Do Unemployment Benefits Increase Unemployment? New Evidence on an Old Question

We examine the relationship between unemployment benefits and unemployment using Swedish regional data. To estimate the effect of an increase in unemployment insurance (UI) on unemployment we exploit the ceiling on UI benefits. The benefit ceiling, coupled with the fact that there are regional wage differentials, implies that the generosity of UI varies regionally. More importantly, the actual generosity of UI varies within region over time due to variations in the benefit ceiling. We find fairly robust evidence suggesting that the actual generosity of UI does matter for regional unemployment. Increases in the actual replacement rate contribute to higher unemployment as suggested by theory. We also show that removing the wage cap in UI benefit receipt would reduce the dispersion of regional unemployment. This result is due to the fact that low unemployment regions tend to be high wage regions where the benefit ceiling has a greater bite. Removing the benefit ceiling thus implies that the actual generosity of UI increases more in low unemployment regions.unemployment, unemployment insurance, unemployment dispersion

Do unemployment benefits increase unemployment? New evidence on an old question

We examine the relationship between unemployment benefits and unemployment using Swedish regional data. To estimate the effect of an increase in unemployment insurance (UI) on unemployment we exploit the ceiling on UI benefits. The benefit ceiling, coupled with the fact that there are regional wage differentials, implies that the generosity of UI varies regionally. More importantly, the actual generosity of UI varies within region over time due to variations in the benefit ceiling. We find fairly robust evidence suggesting that the actual generosity of UI does matter for regional unemployment. Increases in the actual replacement rate contribute to higher unemployment as suggested by theory. We also show that removing the wage cap in UI benefit receipt would reduce the dispersion of regional unemployment. This result is due to the fact that low unemployment regions tend to be high wage regions where the benefit ceiling has a greater bite. Removing the benefit ceiling thus implies that the actual generosity of UI increases more in low unemployment regions.Unemployment; Unemployment insurance; Unemployment dispersion

Estimating Income Responses to Tax Changes: A Dynamic Panel Data Approach

Recent research on the behavioral effects of income taxes has to a large extent focused on the elasticity of taxable income with respect to the net-of-tax rate, i.e., one minus the marginal tax rate. We offer new evidence on this matter by making use of a large panel of Swedish tax payers over the period 1991-2002. Changes in statutory tax rates as well as discretionary changes in tax bracket thresholds provide exogenous variations in tax rates that can be used to identify income responses. We estimate dynamic income models which allow us to distinguish between short-run and long-run effects in a straightforward fashion. The estimates of the long-run elasticity of income with respect to the net-of-tax rate typically hover in a range between 0.20 and 0.30. The short-run elasticities are in general smaller but less precisely estimated. We use the estimates to simulate the fiscal consequences of a tax reform that reduces the top marginal tax rate by five percentage points. Such a reform turns out to have negligible effects on tax revenues and may even yield a fiscal surplus.marginal tax rates, progressive taxes, earned income, tax reform

School choice and segregation: evidence from an admission reform

This paper studies the effects of school choice on segregation. We analyze the effect of a reform in Stockholm that changed the admission system of public upper secondary schools. Before the year 2000, students had priority to the school situated closest to where they lived, but from the fall of 2000 and onwards, admission is based on grades only. We show that the distribution of students over schools changed dramatically as a response to extending school choice. As expected, the new admission policy increased segregation by ability. However, segregation by family background, as well as, segregation between immigrants and natives also increased significantly.School choice; segregation