Sagiri Kitao

Quantifying the Effects of the Demographic Transition in Developing Economies

This paper evaluates quantitatively the impact of the observed demographic transition on aggregate variables (factor prices, saving rate, output growth), and on inter-generational welfare in developing economies. It does so by developing a large-scale two-region equilibrium overlapping generations model calibrated to the North (more developed countries) and the South (less developed countries). The paper highlights that the effects of the demographic trends for less developed regions may depend on the degree of international capital mobility and on the extent to which the large Pay-As-You-Go systems in place in the more developed world will be reformed.

Why Small Businesses Were Hit Harder by the Recent Recession

Although both large and small businesses felt the sting of job losses during the 2007-09 downturn, small firms experienced disproportionate declines. A study of the recession’s employment effect on small firms suggests that poor sales and economic uncertainty were the main reasons for their weak performance and sluggish recovery—problems that affected large firms too, but to a lesser degree. Although a tightened credit supply constrained some small firms, weak consumer demand for the firms’ products and services was a more pressing factor, reducing revenues and dampening new investment spending.

Short-Run Fiscal Policy: Welfare, Redistribution, and Aggregate Effects in the Short and Long Run

This paper quantifies the effects of two short-run fiscal policies, a temporary tax cut and a temporary rebate transfer, that are intended to stimulate economic activity. A reduction in income taxation provides immediate incentives to work and save more, raising aggregate output and consumption. A temporary rebate is mostly saved and increases consumption marginally. Both policies improve the overall welfare of households, and the rebate policy especially benefits low-income households. In the long run, however, the debt accumulated to finance the stimulus and a higher tax to service the debt can crowd out capital and reduce output and consumption, causing welfare to deteriorate.

Health Insurance and Tax Policy

The U.S. tax policy on health insurance favors only those offered a group insurance through their employers. This policy is highly regressive since the subsidy takes the form of deductions from the progressive tax system. The paper investigates alternatives to the current policy. We find that the complete removal of the subsidy results in a significant reduction in the insurance coverage and serious welfare deterioration. However, eliminating regressiveness in the group insurance subsidy and extending benefits to the private insurance market improve welfare and raise the coverage. Our work is the first in highlighting the importance of studying health policy in a general equilibrium framework with an endogenous demand for the health insurance. We use the Medical Expenditure Panel Survey (MEPS) to calibrate the process for income, health expenditure shocks, and health insurance offer status and succeed in producing the pattern of insurance demand as observed in the data, which serve as a solid benchmark for the policy experiments.

Subsidizing Job Creation in the Great Recession

We analyze the effects of various labor market policies on job creation, job destruction, and employment. The framework of Mortensen and Pissarides (2003) is used to model the dynamic interaction between firms and workers and to simulate their responses to alternative policies. The equilibrium model is calibrated to capture labor market conditions at the end of 2009, including the unemployment, inflow, and outflow rates by workers of different educational attainment. We consider the equilibrium effects of a hiring subsidy, a payroll tax reduction, and an employment subsidy. While calibrating parameters that characterize these policies, we try to mimic the policies in the Hiring Incentives to Restore Employment (HIRE) Act of 2010. We find that a hiring subsidy and a payroll tax deduction, as in the HIRE Act, can stimulate job creation in the short term, but can cause a higher equilibrium unemployment rate in the long term. Employment subsidies succeed in lowering the unemployment rate permanently, but the policy entails high fiscal costs.

When do we Start? Pension reform in ageing Japan

Japan is going through rapid and significant demographic aging. Fertility rates have been below replacement level for four decades, and life expectancy has increased by 30 years since the 1950s. The pension reform of 2004 is expected to reduce the replacement rate, but there is much uncertainty as to when and whether the adjustment will be complete. The normal retirement age of 65 will be the lowest among major developed countries. This paper simulates pension reform to reduce the replacement rate by 20% and raise the retirement age by three years gradually over a 30-year period. We consider three scenarios that differ in timing to initiate reform and let the consolidation start in 2020, 2030, and 2040, respectively. A delay would suppress economic activities, lowering output by up to 4% and raising the tax burden by more than eight percentage points of total consumption. Delaying reform also implies a major tradeoff across generations and deteriorates the welfare of future generations by up to 3% in consumption equivalence.

Can Guest Workers Solve Japan's Fiscal Problems?

The labor force in Japan is projected to fall from about 64 million in 2014 to nearly 20 million in 2100. In addition, large increases in aging related public expenditures are projected which would require unprecedented fiscal adjustments to achieve sustainability under current policies. In this paper, we develop an overlapping generations model calibrated to micro and macro data in Japan and conduct experiments with a variety of guest worker and immigration programs under different assumptions on factor prices and labor productivities. Against a baseline general equilibrium transition which relies on a consumption tax to achieve fiscal sustainability, we compute alternative transitions with guest worker programs that bring in annual flows of foreign born workers residing in Japan for 10 years with the share of guest workers in total employment in a range between 4% and 16%. Depending on the size and skill distribution of guest workers, these programs significantly mitigate Japans fiscal imbalance problem with a relatively manageable and temporary increase in the consumption tax rate.

Macroeconomic and redistributional effects of consumption taxes in the usa

This paper studies the effect of an increase in consumption taxes using a dynamic general equilibrium model of overlapping generations calibrated to the US economy. When the proceeds are used to reduce income taxes, the reform raises the aggregate capital and labour supply in the long run. Workers increase labour supply immediately in response to the reform, while consumption rises only gradually. The tax reform also transfers wealth from old consumers to young consumers. As a result, while future generations experience significant welfare gains, current generations, particularly old consumers, tend to experience sizable welfare losses. When the proceeds are used for a lump-sum transfer, the aggregate capital and labour both decrease in the long run. This reform is welfare-improving for the current low-income households.

Labor-dependent capital income taxation that encourages work and saving

This paper proposes a simple mechanism of capital taxation that is negatively correlated with labor supply. Using a life-cycle model of heterogeneous agents, I show that this tax scheme provides a strong work incentive when households possess large assets and high productivity later in the life cycle, when they would otherwise work less. This reformed system also adds to the saving motive and raises aggregate capital. Moreover, the increased economic activities expand the tax base, and the revenue-neutral reform results in a lower average tax rate. My findings show that this tax scheme improves long-run welfare and that the majority of current generations would experience a welfare gain from a transition to the reformed system.

Capital Income Taxation with Work Incentives

This paper uses a life-cycle model of heterogeneous agents to study a capital income tax that rewards hard work. We propose a simple mechanism of capital taxation which is negatively correlated with labor supply. It provides a strong work incentive when households possess large assets and high productivity later in the life-cycle, when they otherwise would reduce labor supply. With the ex-post higher after-tax return from assets, the system also adds to the saving motive and all the aggregate variables including capital, labor and consumption will rise. The higher capital-labor ratio increases the wage rate, which benefits households with fewer assets. The increased economic activities expands the tax base and the revenue neutral reform results in the lower average tax rate. The system improves long-run welfare and the majority of current generations would support a transition to the reformed system.