War finance and the baby boom

In this paper, I extend the Barro–Becker model of endogenous fertility to incorporate specific fiscal policies and use it to study the effects of the fiscal policy changes following WWII on fertility in the United States. The US government went through large changes in fiscal policy after the beginning of WWII. The marginal income tax rate for an average American jumped from 4% on average before 1940 to approximately 25% during the war and stayed around 20% afterwards. The government debt–GDP ratio jumped from approximately 30% on average before WWII to 108% in 1946 and then dropped gradually in the following two decades to about 30% again at the end of 1960s. I find that the dramatic increase in the marginal income tax rate was an important cause of the postwar baby boom in the US because it lowered the after-tax wage and thus the opportunity cost of child-rearing. I also find that the differential change in taxes by income was an important reason why the baby boom was more pronounced among richer households (as documented by Jones and Tertilt, 2008). Furthermore, I argue that the government's debt policy may also matter for understanding fertility choices because government debt implies a tax burden on children in the future and thus affects their utility, which is a key determinant of current fertility choice in the Barro–Becker model. The results of a computational experiment show that the US government's postwar debt policy also contributed to the baby boom, but its quantitative importance is relatively small.     

Saving,fertility and public policy in an overlapping generations small open economy

Motivated by the recent increase of public debt experienced by many developed countries, we develop an OLG model to provide the fiscal policies needed for any public debt level to be sustainable in steady state and the consequences that such policies produce on saving and fertility in a small open economy. Our main finding is that a reduction of public debt (an event currently publicly debated) needs tax adjustments that eventually will be detrimental for both fertility and saving under a low-interest-rate regime (possibly similar to the current world regime), with opposite transitional effects on fertility and saving. On the contrary, the needed fiscal adjustments will eventually increase saving and fertility under a high-interest-rate regime, with opposite transitional effects on fertility and saving. Besides providing clear-cut policy implications, our analysis offers possible testable implications concerning the pattern of fertility, taxes and public debt observed in many developed economies.     

地方财政政策逆周期调节：财政分权还是债务增发*

财政政策工具实际操作偏离最初设计将会降低政策工具的调控效果，导致宏观经济波动加剧。针对地方政府财政政策的逆周期性调控目标，本文关注财政分权深化和政府债务增发的逆周期性效应。研究发现：地方政府财政政策总体呈现顺周期特征。财政分权程度的提高放大了地方财政政策的顺周期性。地方政府债务增发使地方财政政策呈现逆周期特征。地方政府财政政策及其收入面、支出面均呈现顺周期性，由“顺”转“逆”的债务平衡点分别为0137，0113，0209。当前绝大部分地区的债务规模都在债务平衡点之下。驱动地方政府债务逆周期调控的内在因素是官员晋升激励。晋升激励的程度越高，地方债务逆周期调控的力度就越大。但外部市场融资环境的波动削弱了地方政府债务逆周期调控的力度。本文的政策主张是，不宜过度财政分权，应该扩大地方债发行规模，促使地方财政政策逆周期调节。     

Political economy of taxation,debt ceilings,and growth

This study presents voting on policies, including labor and capital income taxes and public debt, in an overlapping-generations model with physical and human capital accumulation, and analyzes the effects of a debt ceiling on a government's policy formation and its impact on growth and welfare. The results show that the debt ceiling induces the government to shift the tax burdens from the older to younger generations, but stimulates physical capital accumulation and may increase public education expenditure, resulting in a higher growth rate. Alternatively, the debt ceiling is measured from the viewpoint of a benevolent planner and lowering the debt ceiling (i.e., tightening fiscal discipline) makes it possible for the government to approach the planner's allocation in an aging society.     

政府债务会影响财政支出的乘数效应吗?—来自跨国面板数据的经验证据

文章在构建一个局部均衡模型的基础上,采用150个国家(地区)2000?2014年的面板数据,实证考察了政府债务对财政支出乘数效应的影响,得到了与理论预期一致的经验证据.结果表明:(1)政府债务会显著影响财政支出的乘数效应.随着政府债务水平的提高,财政支出的乘数效应趋于减弱.尤其是在克服内生性问题之后,这一结论仍然成立;(2)政府债务作用存在显著的非线性特征.当政府债务占GDP的比重突破88%的阈值后,财政支出的乘数效应会在低债务国家和高债务国家之间发生非常迅速的逆向转换;(3)对中国这样的低债务国家,顺周期的财政政策运用是非常有效的.而对美国、希腊等已经处于高债务水平的国家,采取逆周期的财政政策才能避免潜在的经济波动风险.     

On the relationship between fertility and public national debt

Public debt and fertility are two issues of major concern in the current economic policy debate, especially in countries with below-replacement-fertility and large debt (which appears further enlarged as a consequence of the recent world financial distress 2008–2009). In this paper we show that, at the steady state, public debt is in general harmful for fertility, in that debt issuing almost ever crowds fertility. The relationship is however reversed if debt is sufficiently low and the share of capital (labor) in the economy is sufficiently low (high). Hence, our analysis would recommend that developed, capital intensive economies (such as OECD countries) aiming at a fertility recovery should reduce national debt, while developing, labor intensive economies, aiming at reducing fertility, should increase (reduce) national debt only if they are debt virtuous (vicious).     

“CONVENTIONAL” MONETARY POLICY IN OLG MODELS: REVISITING THE ASSET-SUBSTITUTION CHANNEL

Conventional monetary policy involves actions by the monetary and fiscal authorities: the former sets a nominal interest rate and the latter sets lump-sum taxes to finance the implied flow of interest payments on government debt. We model such policy within an overlapping generations framework and show that absent any other frictions the magnitude of the nominal interest rate gives rise to asset substitution between government debt and either private debt or capital—substitution that has both real and nominal effects. Such substitution is not in standard New Keynesian models because their dynastic specification implies that government debt is not net wealth.     

Public Debt,Productive Public Spending and Endogenous Growth

We analyse the effects of public debt in a basic endogenous growth model with productive public spending. We demonstrate that a discretionary policy in general violates the intertemporal government budget constraint along a balanced growth path. A balanced government budget gives a unique saddle point stable growth path. With a rule‐based policy, two saddle point stable balanced growth paths can occur, depending on the intertemporal elasticity of substitution of consumption and on the primary surplus policy. Higher debt goes along with smaller long‐run growth and we derive a condition such that a deficit‐financed increase in public spending raises the growth rate.     

DEBT NONNEUTRALITY,POLICY INTERACTIONS,AND MACROECONOMIC STABILITY*

We study the consequences of nonneutrality of government debt for macroeconomic stabilization policy in a sticky‐price model. Ricardian equivalence fails because debt has a negative impact on its rate of return and on private savings, which is induced by assuming transaction services of bonds. Under aggressive monetary policy regimes, macroeconomic fluctuations tend to be stabilized if nominal budget deficits are low. A smooth debt path limits inflation expectations, such that inflation variances can be reduced. Under a balanced budget policy, the central bank's output gap–inflation volatility trade‐off is improved relative to an environment where debt is neutral.     

The Optimal Level of Debt in an OLG Model with Endogenous Fertility

Abstract. In the present work we extend Diamond's OLG model by allowing for endogenous fertility and look at the consequences of such an extension on the rules for optimal public debt issuing. In particular, we show that the condition according to which the rate of growth of population should be higher than the interest rate is no longer sufficient for obtaining welfare improvements via debt increases and that the level of optimal debt is, ceteris paribus, lower than the one arising with exogenous fertility. Finally, a sensitivity analysis shows that the optimal level of debt is higher the lower the capital share, the higher individuals' degree of patience, the bigger the child‐rearing cost and the lower the preference for children. On policy grounds we argue that debt‐tightening policies may be optimal in the long run provided that the cost of rearing children does not increase (or, if anything, does decrease).     

公共资本投资、内生经济增长与合理政府债务规模*

本文基于一个具有内生增长机制的三部门世代交叠模型,讨论了政府举债为公共投资进行融资时经济的长期均衡;同时,通过数值模拟方法考察了我国的均衡政府债务规模及其影响因素。结果表明：在特定条件下,经济系统存在一个正的均衡政府债务-产出比重,该债务比重水平明显受到公共投资—产出比重、公共投资的债务融资比重、民间资本产出弹性等参数的影响。但是,均衡政府债务比重并不是无限上升的,当上述参数超过特定临界值时,经济系统无法达到均衡,政府债务-产出之比将持续上升,财政将不可持续。另外,当民间资本产出弹性较低时,较高的均衡政府债务比重可能导致经济运行动态无效率。数值模拟结果还显示,基于不同的假设情形,我国的均衡政府债务-产出比重均在不同程度上高于当前实际的政府债务规模,这为我国在未来期间实施扩张性财政政策提供了有利的依据。     

Public capital,sustainable debt and endogenous growth

We analyze an endogenous growth model with public capital and public debt where we posit that the primary surplus of the government is a positive function of cumulated past debt with an exponentially declining weight put on debt further back in time. We consider two scenarios: first, we study the model assuming that the government runs a balanced budget and, then, we compare the outcome to that of the model with permanent deficits. We analyze growth effects of the two scenarios and we study how fiscal policy of the government affects the dynamics of the model economy. It is demonstrated that the balanced growth rate is higher when cumulated past public debt is smaller. Further, we show that the debt policy of the government crucially determines the dynamics of the model economy and that endogenous growth cycles can arise.     

Optimal fiscal and monetary policies in the face of rare disasters

This paper studies optimal fiscal and monetary policies in an economy exposed to large adverse shocks (rare disasters). We contrast optimal policies under commitment and discretion and identify several striking differences between these institutional environments. A government that can commit to its policy plans relies heavily on debt to smooth the adverse effects of large shocks over time. Lack of commitment seriously limits the government's ability to use debt as a shock absorber. Under discretion, an increase in debt leads to an increase in inflation expectations and therefore higher nominal interest rate distortions. Hence, the discretionary government keeps debt in close vicinity of its steady-state level, and the response of taxes, inflation, and interest rates to shocks is much more pronounced under discretion than under commitment. This is particularly relevant for large shocks and when the initial stock of government debt is already high at the time the shock occurs. We also argue that the adverse welfare effects of disasters are larger under discretion than under commitment, but these welfare differentials can be significantly reduced by making the discretionary government inflation averse.     

Fiscal policy over the real business cycle: A positive theory

This paper explores the implications of the political economy model of Battaglini and Coate (2008) [8] for the behavior of fiscal policy over the business cycle. The model predicts that fiscal policy is counter-cyclical with debt increasing in recessions and decreasing in booms. Public spending increases in booms and decreases during recessions, while tax rates decrease during booms and increase in recessions. In both booms and recessions, fiscal policies are set so that the marginal cost of public funds obeys a submartingale. When calibrated to the US economy, the model broadly matches the empirical distribution of debt and also its negative correlation with output. However, the predictions of pro-cyclical spending and counter-cyclical taxation do not find empirical support. The calibrated model generates the same fit of the data as a benevolent government model in which the government faces an exogenous lower bound on debt. Nonetheless, the two models have very different comparative static implications.     

我国地方政府债务风险的 度量、评估与释放

本文度量和评估了我国地方政府的债务风险,结果显示,地方政府的债务余额虽在可控范围内,但新增债务比率已超过预警线,地方政府存在一定的潜在债务风险。本文从分权体制和道德风险两个层面剖析了引致地方政府债务风险的原因,梳理了应对地方政府债务风险的逻辑体系,从制度基础、事前审核把关、事中动态监控、事后反思改进等方面为解决地方政府债务风险提供了政策建议。     

外汇储备、银行危机与政府政策

本文探讨了在实行固定或钉住汇率制度条件下,面对商业银行清偿能力危机时,政府是否应该救助的问题。经研究发现:在外汇储备充足时,当商业银行的不良资产较多,或该国的信贷市场处于不断发展与扩张的阶段,政府应该救助;在外汇储备不充足时,当该国的信贷市场处于不断发展与扩张的阶段,政府应该救助;当商业银行的不良资产较多时,政府是否救助视该国具体情况而定;当该国外债规模较大时,政府不应该提供救助。     

Monetary policy and fiscal limits with no-default

This paper discusses monetary and fiscal policy interactions that stabilize government debt. Two distortions prevail in the model economy: income taxes and liquidity constraints. Possible obstructions to fiscal policy include a ceiling on the equilibrium debt-to-GDP ratio, zero or negative elasticity of tax revenues, and a political intolerance of raising tax rates. At the fiscal limit two mechanisms restore solvency: fiscal inflation, which reduces the real value of nominal debt, and open market operations, which diminish the size of government debt held by the private sector. Three regimes achieve this goal. In all regimes monetary policy is passive. In all regimes a muted tax response to government debt is consistent with equilibrium. The propensity of a fiscal authority to smooth output is found to determine what is an acceptable response (in the form of tax rate changes) to the level of government debt, while monetary policy determines the timing and magnitude of fiscal inflation. Impulse responses show that the inflation and tax hikes needed to offset a permanent shock to transfers are lowest under nominal interest rate pegs. In this regime, most of the reduction in the real value of government debt comes from open market purchases.     

Sustainability of public debt,public capital formation,and endogenous growth in an overlapping generations setting

Under the golden rule of public finance for public investment with a constant budget deficit/GDP ratio, we show that for the sustainability of government budget deficits there is a threshold of the initial public debt for a given stock of public capital, and that this threshold level of public debt is increasing in the stock of public capital. If the initial public debt is greater than the threshold, the government can no longer sustain budget deficits, while if it is smaller, the government can conduct a permanent deficit policy, which eventually leads to a positive public debt/GDP ratio.     

The fiscal theory of the price level and initial government debt

It is widely believed that the Fiscal Theory of the Price Level (FTPL) does not work in an environment in which initial government debt is zero. This paper demonstrates that this view is incorrect when the government issues a set of financial assets restricted to standard nominal debt contracts and money. In particular, it is possible to define a non-Ricardian fiscal policy for which the set of equilibrium price sequences under non-Ricardian fiscal policy is a proper subset of the set of equilibrium price sequences under Ricardian fiscal policy.