On the Long-Run Distribution of Capital in the Ramsey Model

We study issues related to the long-run distribution of wealth in two variants of Ramsey's model of optimal capital accumulation. First we show that, in the case where a government levies a progressive income tax, there exist infinitely many stationary equilibria in which all households own positive capital stocks. Moreover, it is demonstrated that non-stationary equilibria can exhibit complicated dynamics. Then we discuss the case where households exercise market power on the capital market and we show that this may also lead to equilibria in which all households own positive amounts of capital. Journal of Economic Literature Classification Numbers: E62, O41.     

Asset prices and business cycles under market incompleteness

In this paper, we study the quantitative implications of a real business cycle model where the firm is the capital owner, households are heterogeneous, and markets are incomplete due to restricted asset trade. Since, under these assumptions, the usual firm objective is no longer well defined, several non-standard objectives are incorporated into the model. These include variants of market value maximization and a utility function for the firm. We find that the presence of market incompleteness alters little the behavior of asset returns. On the other hand, the behavior of the macroeconomic aggregates is quite sensitive to the firm objective, which affects the capital accumulation path. In contrast to conventional findings, capital is not necessarily higher when markets are incomplete. In addition, the different capital accumulation effects imply that shareholders with different asset wealth might prefer different firm objectives.     

Growth and optimal policies in an R&D-growth model with imperfect international capital mobility

In this paper, we examine the effects of international capital mobility on innovation, growth, and optimal growth policies in a small open economy with R&D-driven growth. Households can borrow funds from an imperfect international capital market to finance their investment in R&D firms. We show that the economy can reach a higher growth rate if international capital is more mobile. This result is consistent with recent empirical findings. Moreover, we show that the common growth-enhancing policies, such as patent protection and the R&D subsidies, have an additional negative welfare effect when households can access the international capital market. Accordingly, the optimal patent protection and R&D subsidy should be smaller when the degree of international capital mobility is higher.     

Financial market frictions in a model of the Euro area

We build a model of the euro area incorporating financial market frictions at the level of firms and households. Entrepreneurs borrow from financial intermediaries in order to purchase business capital, in the spirit of the “financial accelerator” literature. We also introduce two types of households that differ in their degree of time preference. All households have preferences for housing services. The impatient households are faced with a collateral constraint that is a function of the value of their housing stock. Our aim is to provide a unified framework for policy analysis that emphasises financial market frictions alongside the more traditional model channels. The model is estimated by Bayesian methods using euro area aggregate data and model properties are illustrated with simulation and conditional variance and historical shock decomposition.     

Housing investment in urban China

What explains the rapidly increasing housing investment demand in China? To address this question, we develop an analytical framework featuring how expected capital gains impact households' housing investment decisions when subject to financial constraints. Housing demand in China takes place not only through households' owning multiple houses, but also through their owning a larger primary living residence if they are constrained from buying multiple houses. We show that households are more likely to own multiple houses when expecting higher capital gains. As expected capital gain increases, the primary housing demand of those households who are constrained from owning multiple houses increases, while those owing multiple housing units invest in extra ones instead of improving primary housing. Our empirical findings, based on 2010 and 2011 household survey data, are consistent with our theoretical predictions. We also find that the marginal effect of expected capital gains is higher for wealthier households. This links the booming housing market to widening income inequality which is a typical growth pain in a developing country like China. As an extension, we apply the analysis to derive implications of the institutional features (such as purchasing restriction policy and the existence of subsidized housing) for China’s housing markets.     

The NAIRU reconsidered: why labour market deregulation may raise unemployment

According to the mainstream theory of equilibrium unemployment, persistent unemployment is caused mainly by ‘excessive’ labour market regulation, whereas aggregate demand, capital accumulation and technological progress have no lasting effect on unemployment. We show that the mainstream non‐accelerating inflation rate of unemployment (NAIRU) model is a special case of a general model of equilibrium unemployment, in which aggregate demand, investment and endogenous technological progress do have long‐term effects. It follows that labour market deregulation does not necessarily reduce steady‐inflation unemployment. Theoretically, if the decline in real wage growth claims owing to deregulation is smaller than the ensuing decline in labour productivity growth and in the warranted real wage growth, then in that case steady‐inflation unemployment may increase. Empirical evidence for 20 Organisation for Economic Cooperation and Development (OECD) countries (1984–1997) indicates that the impact of labour market deregulation on OECD unemployment is zero, and possibly negative (causing a higher rate of unemployment).     

On model ambiguity and money neutrality

We solve for the equilibrium of a stochastic neo-classical continuous time model without and with money under model ambiguity. We show that: (i) the correction for ambiguity stemming from the money supply is nil at equilibrium; (ii) money is neutral with respect to the stock market equilibrium (the equity risk premium); (iii) money is not neutral with respect to consumption and capital accumulation, and its effect may be quantitatively substantial; (iv) the preference for model robustness affects all the real economic variables as well as the expected inflation rate and the nominal interest rate.     

国际储备积累、实物与资产价格通胀及货币政策独立性

本文理论模型显示,国际储备积累引起的货币增发会导致实物和资产价格上涨,降低货币政策独立性。首先,尽管货币政策工具短期内可以通过冲销和抑制信贷等方法控制通胀,但只要顺差积累足够大,长期无法阻止通胀。其次,如果人们预期央行未来会让物价上升,即使物价当前仍被较好地控制,资产价格也可能出现大幅上涨。最后,在"不可能三角"中,即使放弃资本自由流动,也并不意味着就能同时拥有汇率稳定和独立货币政策。     

Stock prices and inflation hedged firms

As the Federal Reserve continues its near-zero rate policy, the threat of inflation remains a concern among both policymakers and businesses. This article uses over 30 years of accounting data and stock returns to examine how publicly traded firms respond to increasing inflation expectations. We first examine whether firms make balance sheet adjustments in response to expected inflation. We then examine whether these activities have a positive effect on stock prices. We find that firms increase inventory, increase capital expenditures and reduce long-term debt when there is an increased expectation of inflation. We then find that firms that increase inventory in this economic regime are rewarded in the market. Markets also reward firms that increase their cash positions and reduce long-term debt possibly suggesting investor flight to safety.     

Inflation and capital gains taxes in a small open economy

Inflation distorts an economy through many channels. This paper highlights the interaction between inflation and capital gains tax and their distortions to a small open economy through the financial market. This research captures several observations. First, capital formation or investment is an important channel for consumption smoothing over the life cycles. Second, capital gains are taxed only when the gains are realized. Third, inflation introduces an upward bias in the calculation of tax base. Thus, a capital gains tax in the presence of inflation can have a significant welfare effect even though its contribution to the government revenue is relatively small. The quantitative analysis shows that high inflation alone can lower social welfare. This problem becomes more severe when capital gains tax is introduced in an inflationary economy. The implicit inflation tax can be more hazardous to the economy than the explicit counterpart.     

Inflation and output dynamics in a model with labor market search and capital accumulation

In a sticky-price model with labor market search and habit persistence, Walsh (2005) shows that inertia in the interest rate policy helps to reconcile the inflation and output persistence with empirical observations for the US economy. We show that this finding is sensitive with regard to the introduction of capital formation. While we are able to replicate the findings for the inflation inertia in a model with capital adjustment costs and variable capacity utilization, the output response to an interest shock is found to be too large and no longer hump-shaped in this case. In addition we find that the response of output to a technology shock can only be reconciled with empirical findings if either the adjustment of the utilization rate is very costly or there is only a modest amount of nominal rigidity in the economy.     

INFLATION INEQUALITY IN THE UNITED STATES

Different spending patterns across households and differences in price increases across goods and services lead to unequal levels of inflation faced by different households. In this paper we measure the degree of inequality in inflation across U.S. households for the period 1987–2000. The broad picture that emerges from our results is that over our whole sample period there are substantial differences in the inflation experiences across U.S. households. We find that the cost of living increases were generally higher for the elderly, in large part because of their health care expenditures, and that the cost of living of poor households is most sensitive to the, historically large, fluctuations in gasoline prices. Still, when looking at the whole population, we find that individual households that are confronted with high inflation in one year do not generally face high inflation in the subsequent year as well.     

Does religious faith affect household financial market participation? Evidence from China

Based on the 2013 China Household Finance Survey data, this paper investigates the impact of religious faith on household financial market participation and portfolio choice. The results show that religious faith can significantly promote household financial market participation. Besides, religious faith can increase the proportion of risky assets held by households, including equities. We also find that the need for social interaction and human capital accumulation can significantly induce religious residents to participate in financial markets and hold risky assets. Overall, our results reveal how faith affects household finance activities in China.     

Human capital accumulation in R&D-based growth models

This paper develops a model that reproduces the essential aspects of the recent ICT-based economy using the framework of endogenous growth theory in which a central role is played by human capital accumulation. In particular, it considers a multi-sectoral growth model in discrete time with infinite horizon, endogenous growth, embodied technological progress, horizontal differentiation and “lab-equipment” specification of R&D, and with human capital accumulation (represented by the fact that households devote a fraction of their time to schooling), in order to take into account the crucial role of the latter when new technologies are present. In this model it is possible to obtain some important results, both analytically and through simulations, either in the case of constant productivity of schooling and in the case in which this productivity is a function of technological progress. The first conclusion is that the productivity of schooling affects the long run growth of the economy, contrary to the productivities of the other sectors, hence in this model human capital accumulation is the true engine of growth. It is then possible to study the reaction of the economy to different types of shocks, and to compare the results with the empirical evidence. The conclusion is that the model is able to reproduce such evidence, suggesting that the interaction between ICT and human capital is one of the drivers of the recent economic performance.     

Collateral secured loans in a monetary economy

This paper presents a microfounded model of money where durable assets serve as a guarantee to repay consumption loans. We study a steady state equilibrium where money and credit coexist. In such an equilibrium, a larger investment in durable capital relaxes the borrowing constraint faced by consumers. We show that the occurrence of over-investment and the behavior of capital accumulation depend on the rate of inflation, the relative risk aversion of agents and the marginal productivity of the capital goods.     

经济金融化行为的政治经济学分析--一个演化博弈框架

自2008年美国金融危机发生以来,经济金融化成为国内外学界关注的焦点。文章从政治经济学的角度指出了金融化的本质在于资本积累演变为资本脱离剩余价值的生产与交换而通过金融系统实现增殖的过程,进而通过构建一个包含异质性主体的非对称演化博弈模型,揭示了非金融主体与金融主体之间从普通经济关系到金融关系的动态演变过程及其作用机制。研究表明：(1)经济主体之间的动态关系演变表现为非金融企业主要通过金融活动获取利润,金融企业则关注中间业务和表外业务并将普通家庭纳入其体系使之成为新的利润源泉,而普通家庭则被迫接受强势经济主体的二次分利,这些关系的变化将导致一国经济的金融化乃至金融危机。(2)经济发展状态取决于金融主体与非金融主体之间的相互关系,其中,非金融主体行为起主导性作用。在既定假设下,当非金融主体仅通过其资源保护行为影响金融主体的分利技术时,既可以促使一国经济走向新的稳定状态也可促使其走向崩溃;当非金融主体通过其资源保护行为和分利技术影响金融主体的分利技术时,经济可以实现演化稳定状态。(3)经济主体的金融化行为有三个层面的影响：一是经济主体的金融化行为促进经济主体自身在短期内实现高额资本积累;二是金融主体的分利行为与非金融主体的生产行为经常呈现对立的经济关系并容易被激化;三是没有政府介入的自由市场必然导致矛盾激化而陷入危机。因此,深入理解经济金融化问题的本质及其对经济的影响机制,对当前中国的经济转型和金融改革都具有重要意义。     

On recursive utility and the superneutrality of money

This paper investigates whether a change in the growth rate of the money supply enhances the rate of capital accumulation in a cash-in-advance monetary model with recursive utility. Although money is superneutral in the steady state, the effect of the growth rate of money supply on the speed of capital accumulation depends not only on the curvature of the felicity, but also on the slope and curvature of the discount rate function. We find that when the discount rate decreases with consumption and the elasticity of marginal utility is greater than unity, inflation yields a slower speed of capital accumulation.     

What determines households inflation expectations? Theory and evidence from a household survey

The purpose of the present paper is to study how households form inflation expectations using a novel survey dataset of Italian households. We extend the existing ‘inattentiveness’ literature by incorporating explicitly inflation targets and distinguishing between aggregate and disaggregate dynamics based on demographic groups. We also consider both the short- and long-run dynamics as households update their inflation expectations. While we find clear distinctions between the various demographic groups behavior, households tend to absorb professionals forecast. The short-run dynamics also indicate they not only overreact when updating their expectations but also adjust asymmetrically to any perceived momentum change of future inflation.     

Endogenous capital market imperfections, human capital, and intergenerational mobility

In this paper, capital market imperfections are endogenized considering an adverse selection problem between banks and borrowers. We develop a growth model with linear OLG wealth dynamics, where agents are heterogeneous in terms of observable wealth and ability, which is private information. We show that banks react to this informational asymmetry by granting higher loans to talented borrowers. This, in turn, helps poor and talented agents to become educated and catch up with the rich agents. Furthermore, the credit market friction leads to greater human capital accumulation.     

Endogenous capital market imperfections,human capital,and intergenerational mobility

In this paper, capital market imperfections are endogenized considering an adverse selection problem between banks and borrowers. We develop a growth model with linear OLG wealth dynamics, where agents are heterogeneous in terms of observable wealth and ability, which is private information. We show that banks react to this informational asymmetry by granting higher loans to talented borrowers. This, in turn, helps poor and talented agents to become educated and catch up with the rich agents. Furthermore, the credit market friction leads to greater human capital accumulation.