Reducing government debt in the presence of inequality

What are the welfare effects of government debt? In particular, what are the welfare consequences of government debt reductions? We answer these questions with the help of an incomplete markets economy with production. Households are subject to uninsurable income shocks. We make several contributions. First, by targeting the skewed wealth and earnings distribution of the US economy in our calibration, we identify inequality as the major driver of the welfare effects of public debt/GDP changes. Second, we show that in order to fully gauge the welfare consequences and the political feasibility of government debt changes, it is crucial to consider the transitional dynamics between stationary equilibria. Our results therefore have important implications for the design of debt reduction policies. Since the skewed wealth distribution generates a large fraction of borrowing-constrained households, a public debt reduction should be non-linear, such that the tax burden is postponed into the future.     

Public infrastructure investment,output dynamics,and balanced budget fiscal rules

We study the dynamic macroeconomic effects of public infrastructure investment under a balanced budget fiscal rule, using an overlapping generations model of a small open economy. The government finances public investment by employing distortionary labor taxes. The balanced budget rule implies a negative short-run output multiplier that exceeds (in absolute terms) the positive long-run output multiplier. Larger public capital spillovers sharpen the intertemporal output tradeoff. In contrast to conventional results regarding public investment shocks, we obtain dampened cyclical responses for plausible parameter values. The cyclical dynamics arise from the interaction between the labor tax rate, the tax base, and the intergenerational spillover effects. We show that financing scenarios involving public debt creation can substantially reduce the short-run output contraction and the transitional macroeconomic fluctuations induced by public investment.     

Growth, debt and public infrastructure

This paper presents a closed economy model of endogenous growth driven by capital externalities arising from both private capital and public infrastructure. The model is calibrated to fit data for India, an approximately closed economy. Simulations suggest that fiscal policy certainly matters and the choice of the income taxation rate, the mix of government spending between infrastructure and public consumption goods, and the long-run government debt/GDP ratio can all significantly affect the long-run growth rate. Intertemporal aspects of fiscal policy are also important and the precommitment (time-inconsistent) and non-precommitment policies differ substantially.     

Model uncertainty and intertemporal tax smoothing

In this paper we examine how model uncertainty due to the preference for robustness (RB) affects optimal taxation and the evolution of debt in the Barro tax-smoothing model (1979). We first study how the government spending shocks are absorbed in the short run by varying taxes or through debt under RB. Furthermore, we show that introducing RB improves the model׳s predictions by generating (i) the observed relative volatility of the changes in tax rates to government spending, (ii) the observed comovement between government deficits and spending, and (iii) more consistent behavior of government budget deficits in the U.S. economy. Finally, we show that RB can also improve the model׳s predictions in the presence of multiple shocks.     

Stationary Markov equilibria on a non-compact self-justified set

The existence of stationary processes of temporary equilibria is examined in an OLG model, where there are finitely many commodities and consumers in each period, and endowments profiles and expectations profiles are subject to stochastic shocks. A state space is taken as the set of all payoff-relevant variables, and dynamics of the economy is captured as a stochastic process in the state space. In our model, however, the state space does not necessarily admit a compact-truncation consistent with the intertemporal restrictions because distributions over expectations profiles may have non-compact supports. As shown in Duffie et al. [Duffie, D., Geanakoplos, J., Mas-Colell, A., McLennan, A., 1994. Stationary Markov equilibria. Econometrica 62, 745–781), such a compact-truncation, called a self-justified set, is essential for the existence of stationary Markov equilibria. We extend their existence theorem so as to be applicable to our model.     

Democratic transition and fiscal policy in the Arab world

This paper investigates the relationship between democracy and public debt in the Arab world over the period 2002–2013. The results show strong evidence of an inverted U-shaped relationship between democracy and public debt. This means that democratization is associated with lower debt only when a certain level of democracy is reached. In an attempt to explain these findings, we assume that the effect of democracy on public debt operates mainly through its impact on government spending and government revenue. Our results show that the inverted U-shaped relationship between democracy and public debt stems from the inverted U-shaped democracy-government spending path and the U-shaped democracy-government revenue pattern. This implies that, at the earlier stages of democratization, democracy is associated with an increase in government spending and a decrease in government revenue, which stimulates public debt. However, beyond a certain level of democracy, further democratization reduces government spending and enhances government revenue, leading to lower levels of public debt. Hence, achieving some level of democracy is a key prerequisite to improve the effectiveness of public spending, enhance tax compliance, and thereby control public debt.     

Government debt,learning and the term structure

Does a change in the public׳s holdings of government debt affect the term structure of interest rates? Empirical analysis using a VAR model indicates that a rise in these holdings of the real debt-to-GDP ratio increases both the three-month and ten-year U.S. nominal yields in a statistically significant manner. The maturity composition of debt is also found to matter: innovations in holdings of long-term debt affect the term structure, while increases in short-term debt affect inflation expectations. These effects of changes in holdings of debt on the yield curve can be derived in a general equilibrium model in which the government issues exponentially-maturing riskless debt, financed by lump-sum taxes, and the optimizing agents are adaptive learners. On calibrating the average maturity of debt in the model to match that of U.S. Treasury debt since the 1980s, I find that positive innovations in government debt lead to increases in asset yields. This is because agents do not learn the principle of Ricardian equivalence exactly, and perceive increases in holdings of government bonds as a rise in their net wealth. Imposing rational expectations on the agents eliminates this channel, and changes in holdings of government debt have no effect on yields. The learning model also implies that as the real debt-to-GDP ratio increases, and the average maturity of debt becomes longer, the agents become less likely to learn that Ricardian equivalence holds.     

Investing in Research and Education versus Commodity Programs: Implications for Agricultural Productivity

The long-term impact of research, education, and various government support programs on U.S. agricultural productivity was analyzed using an error correction model. Results indicate that the proposed reduction in commodity program expenditures (e.g. 1996 Farm Bill) is unlikely to reduce agricultural productivity. Results suggest that shifting public funds from commodity programs to education and research would raise U.S. agricultural productivity. Our estimates of long-term rates of return to public research are lower than those from most previous, perhaps due to our improved model specification, but are high enough to justify continued public investments to raise productivity.     

Finite lifetimes,long-term debt and the fiscal limit

The U.S. faces exponentially rising entitlement obligations. I introduce a fiscal limit—a point where higher taxes are no longer a feasible financing mechanism—into a Perpetual Youth model to examine how intergenerational redistributions of wealth, the average duration of government debt, and entitlement reform impact the consequences of explosive government transfers. Three key findings emerge: (1) Growing government transfers cause more severe and more persistent stagflation than in representative agent models that do not capture intergenerational transfers of wealth; (2) A longer average duration of government debt pushes the financing of government liabilities into the future and reduces the short-run impacts of explosive transfers; (3) The time it takes the economy to rebound from a period of growing transfers increases exponentially with the number of years it takes to pass entitlement reform.     

The impact of adjustment and stabilization policies on infrastructure spending in Central America

During the 1980s and 1990s the countries of Central America experienced protracted fiscal crises and debt repayment problems which resulted in the implementation of structural adjustment agreements. Apart from attempting to reestablish fiscal balance and to control inflation, the proponents of adjustment policies sought to enhance growth by de-emphasizing the wasteful aspects of state spending while maintaining public expenditures on physical and human capital, which were believed to promote private sector productivity. By comparing a pre-debt crisis period with the period given by debt crisis and adjustment, the study reveals that the shares of government spending on human and, particularly, physical infrastructure dropped precipitously during the adjustment period. At the same time, the shares devoted to defense and subsidy categories—as well as interest payments on external debt—generally registered notable gains. The experience of adjustment policies in Central America indicated that substantial discrepancies existed between the idea and the reality.     

Debt financing and maintenance expenditure: Theory and evidence on government-operated toll roads in China

Transportation infrastructure is the foundation of economic growth, and the existence of high-quality roads is inseparable from their durable maintenance. However, the burden of heavy debt has brought risks to maintenance management and distorted resource allocation. This study builds a two-stage optimal theoretical model under different debt-financing constraints in China, who has the longest expressway mileage of any country in the world. We establish the two principles of “spend-and-debt” and “debt-and-spend” to demonstrate the substitution effect and the complementary effect of debt financing on maintenance, respectively. Furthermore, we use a time-varying differences-in-differences approach to estimate the effect of the financing of tollway bonds on maintenance and further discuss the mechanism. The results provide evidence that there is a significant improvement in the relationship between tollway bonds and maintenance expenditure, mainly due to the reduction of debt costs and the passive propelling of the government’s spending responsibility. Our proposed theoretical and empirical framework sheds new light on transportation infrastructure research. More specifically, the impetus for public expenditure comes from a decrease of the substitution effect, which not only alleviates the burden of debt scale on the public sector but also provides a reference for developing countries to balance infrastructure construction and maintenance.     

Managing the Public Debt: The Optimal Taxation Approach

This paper examines research on public debt management, focusing on debt structure by denomination, indexation features, and maturity. The optimal taxation approach is reviewed and its policy implications are related to the trade-off between minimization of the expected cost of debt servicing and minimization of budgetary risk. Strong arguments are provided for debt instruments which yield low returns when output and hence revenues are lower and public spending higher than expected. This debt design minimizes tax distortions and provides flexibility in conducting fiscal policy. The exact characterization of the debt composition which supports efficient taxation depends on the stochastic structure of the economy. Long-term nominal debt is a hedge against supply shocks affecting revenues and inflation and makes the government budget insensitive to interest-rate risk. However, at high levels of debt, the extent of insurance or flexibility that governments can obtain by issuing long-term nominal debt is limited by the need to maintain the credibility of the anti-inflation stance.     

Optimal fiscal and monetary policy with occasionally binding zero bound constraints

This paper studies optimal fiscal and monetary policy when the nominal interest rate is subject to the zero lower bound (ZLB) constraint in a stochastic New Keynesian economy. In the baseline model calibrated to match key features of the U.S. economy, it is optimal for the government to increase its spending when at the ZLB in the stochastic environment by about 60 percent more than it would in the deterministic environment. The presence of uncertainty creates a unique time-consistency problem if the steady state is inefficient. Although access to government spending policy increases welfare in the face of a large deflationary shock, it decreases welfare during normal times as the government reduces the nominal interest rate less aggressively before reaching the ZLB.     

Government spending on public infrastructure,prices, production and international trade

This paper examines the impact of a change in government spending on public infrastructure when monopolistic competition prevails in one sector of the economy. The analysis is based on a variation of the Spence-Dixit-Stiglitz model where the presence of internal economies in the production of a differentiated intermediate good leads to specialization based external economies in the production of the final good. It is shown that changes in government spending on public infrastructure can influence relative prices, production, the degree of specialization, and pattern of international trade.     

Modeling and forecasting U.S. public construction

This paper extends Lin's flexible accelerator model of dynamic investment behavior of U.S. public construction by relaxing two of the underlying basic assumptions: (1) the coefficient of adjustment is allowed to vary with the level of government expenditure and (2) the regression coefficients are treated as randomly changing over time rather than being viewed as fixed. The new models afford a better explanation of the behavior of U.S. public construction. Importantly, the forecasting ability of the variable-coefficient-of-adjustment model is tested for the three-year period beyond the sample period and compared to both the Lin's original and ARIMA models. It is found that this new model gives better forecasts of public construction for ten quarters ahead. On the basis of the chi-square test of model stability and the mean squared error, it is concluded that the model with variable adjustment coefficients is a better abstraction of economic reality and improves forecasting accuracy.     

The real effects of inflation in a developing economy with external debt and sovereign risk

In this paper we develop an intertemporal optimizing model to examine the real effects of inflation induced by monetary policy in an open developing economy with external debt and sovereign risk. The economy faces an upward sloping supply curve of debt. In our model, households require real balances in advance for consumption expenditures, and monetary policy involves targeting the inflation rate. We show that an increase in the inflation rate leads to a decrease in the stock of foreign debt. It also leads to a decrease in consumption, employment, capital accumulation and output in the long run. Our results show that the accumulation of foreign debt exhibits non-monotonic adjustment. Particularly, an increase in the inflation rate leads to a current account surplus followed by a deficit. Along with this non-monotonicity, our model also explains the positive correlation between savings and investment during the transitional periods (Feldstein–Horioka puzzle).     

Relative productivity growth and the secular “decline” of U.S. manufacturing

There has been considerable debate about the causes of the “decline” of U.S. manufacturing over the post-war period. We show that the behavior of employment, prices and output in manufacturing relative to services over this period can be explained by a two-sector growth model in which productivity shocks are the only driving forces. Household preferences turn out to play a key role in our model. The data are consistent with a specification where households are unwilling to substitute goods for services (the estimated elasticity of substitution is statistically indistinguishable from zero), so the economy adjusts to differential productivity growth entirely by re-allocating labor across sectors.     

What did Frederick the great know about financial engineering? A survey of recent covered bond market developments and research

This article is a survey of the covered bond market with a focus on recent developments in the U.S. Covered bonds are debt obligations secured by a pool of assets, usually consisting of residential mortgages or other public debt. The covered bond asset pool is ring-fenced, dynamically managed, and remains on the balance sheet of the issuer. The issuer replaces non-performing assets and maintains a minimum overcollateralization level. U.S. lawmakers, regulators, and financial institutions are currently working toward jump-starting a market for U.S. issued covered bonds. Recent academic research has focused on the determinants of covered bond spreads and whether these instruments can become an alternative source of mortgage financing in the U.S.     

Fiscal policy,debt constraint and expectations-driven volatility

Imposing some constraints on public debt is often justified regarding sustainability and stability issues. This is especially the case when the ratio of public debt over GDP is restricted to be constant. Using a Ramsey model, we show that such a constraint can however be a fundamental source of indeterminacy, and therefore, of expectations-driven fluctuations. Indeed, through the intertemporal budget constraint of the government, income taxation negatively depends on future debt, i.e. on the expected level of production. This mechanism ensures that expectations on the future tax rate may be self-fulfilling. We show that this is promoted by a larger ratio of debt over GDP.     

人力资本与基础设施投资的动力学分析

本文将公共支出引入一个两部门城市化和内生增长模型,由模型导出的人力资本跨时转移条件方便我们分析经济的过渡动力学行为。数值解结果表明,在物质资本报酬递减的情形下,公共支出的部门间配置由经济过渡动力内在地确定和稳定;如果物质资本表现出某种程度的报酬递增,公共支出的部门间配置将表现出内在不稳定。动力学分析表明,公共支出与经济增长之间存在非线性关系,换言之,存在促进经济增长的最优税率或最优公共支出比例。