On the Effectiveness of Growth-Enhancing Policies in a Model of Growth Without Scale Effects

Standard R&D growth models have two disturbing properties: the presence of scale effects (i.e., the prediction that larger economies grow faster) and the implication that there is a multitude of growth-enhancing policies. Recent models of growth without scale effects, such as Segerstrom's (1998), not only remove the counterfactual scale effect, but also imply that the growth rate does not react to any kind of economic policy. They share a different disturbing property, however: economic growth depends positively on population growth, and the economy cannot grow in the absence of population growth. The present paper integrates human capital accumulation into Segerstrom's (1998) model of growth without scale effects. Consistent with many empirical studies, growth is positively related not to population growth, but to investment in human capital. And there is one way to accelerate growth: subsidizing education.     

Population and Economic Growth Under Different Growth Engines

Using a growth model with physical capital accumulation, human capital investment and horizontal R&D activity, this paper proposes an alternative channel through which an increase in the population growth rate may yield a non‐uniform (i.e., a positive, negative, or neutral) impact on the long‐run growth rate of per‐capita GDP, as available empirical evidence seems mostly to suggest. The proposed mechanism relies on the nature of the process of economic growth (whether it is fully or semi‐endogenous), and the peculiar engine(s) driving economic growth (human capital investment, R&D activity, or both). The model also explains why in the long term the association between population growth and productivity growth may ultimately be negative when R&D is an engine of economic growth.     

Education,Innovation and Long‐Run Growth

We extend a second‐generation Schumpeterian growth model to incorporate human capital accumulation to clarify the general equilibrium effects of subsidy policies on human capital accumulation and R&D activities in a unified framework. Despite the conventional argument that subsidies always stimulate these growth‐promoting activities, we find that subsidies asymmetrically affect human capital accumulation and R&D activities. Our theoretical results suggest that research using standard models of human capital might find false negative relationships between education subsidies and economic growth.     

Capital Accumulation and Innovation as Complementary Factors in Long-Run Growth

We study capital accumulation and innovation as determinants of long-run growth by adding capital to our earlier model of creative destruction. No special functional forms are imposed on the aggregate production function. The equations describing perfect foresight equilibrium are identical to those of the augmented Ramsey-Cass-Koopmans model, except that the rate of technological change is a function of the stock of capital per effective worker. Contrary to previous models, a subsidy to capital accumulation will raise the long-run growth rate. The key assumption is that capital is used in R and D. Some evidence is presented on the capital intensity of R and D.     

Scale Effects,Savings and Factor Shares in a Human Capital-based Growth Model with Physical Capital Accumulation

Using a balanced-growth model with physical and human capital accumulation, we analyze quantitatively the long-run effects of changes in the savings rate and in income distribution (i.e. the shares of physical and human capital in income) on investment in skill acquisition, income growth, and the ratio of human to physical capital. In the long run, the ratio of physical to human capital is constant, so that these two factor inputs can grow at the same rate. This rate is a function of the economy's exogenous technological and preference parameters and depends positively on the share of skills invested in human capital formation. We also find that population growth is neither necessary nor conducive to economic growth, that the level of real income depends linearly on the level of human capital and that it is independent of population size.     

An empirical test of the Post-Keynesian growth model applied to functional income distribution and the growth regime in Brazil

The main purpose of this paper is to empirically investigate whether, between 1970 and 2008, the Brazilian economy was profit-led or wage-led. To this end, we approach a canonical post-Keynesian growth model (PKGM) to estimate certain vector autoregressive (VAR) models and perform Granger non-causality tests. Three main results are extracted from the generalized impulse-response functions provided by the VAR models. First, a positive profit-share innovation affects economic growth and capacity utilization rate, both in the same direction, suggesting a profit-led pattern. Second, a profit share shock positively affects both the ratio actual/potential output, and capital accumulation, reinforcing the previous result. Third, a capacity utilization shock is shown to positively affect both output growth and capital accumulation via the accelerator effect. On the one hand, the pairwise Granger non-causality test does not provide any evidence of causality running from profit share to economic growth or capacity utilization. On the other hand, there is some evidence of Granger causality running from profit share to capital accumulation.     

Research Subsidies, Population Control Policies, and Growth

Several R&D‐based growth models without scale effects claim that subsidies to R&D are not conductive for economic growth while a faster growing population is. Yet, in an effort to maintain high growth rates, most OECD countries continue to subsidize R&D, while several developing countries are trying to control the size of their population. Are these countries misguided? This study introduces an R&D‐based growth model that is characterized by complementarities between technology and human capital. The model is free of scale effects and consistent with the above‐mentioned policies. By applying the model to US data the study uncovers a possible explanation for the productivity slowdown.     

Too Much of a Good Thing? The Quantitative Economics of R&D‐driven Growth Revisited

This article augments an R&D‐based growth model of the third generation with human capital accumulation and impure altruism, calibrates it with U.S. data, and investigates whether the market provides too little or too much R&D. For benchmark parameters, the market share of employment in R&D is close to the socially optimal solution. Sensitivity analysis shows that the order of magnitude of possible deviation between market R&D and optimal R&D is also smaller than suggested by previous studies. Small deviation of total research effort, however, can be compatible with large sectoral misallocations. Furthermore, the model allows for two additional channels through which population growth may affect the resource allocation so that its overall economic impact is no longer predetermined as positive. Numerical calibrations show that economic growth at the average rate in the U.S. over the last century can be consistent with a small and probably negative partial correlation between population growth and economic growth.     

Reexamination of Economic Growth, Tax Policy, and Distributive Politics

The paper examines the relationship between economic growth, tax policy, and distribution of capital and labor ownership in a one‐sector political‐economy model of endogenous growth with productive government spending financed by a proportional tax on capital income. The analysis shows that inequality in wealth and income can be positively or negatively related to the optimal tax rate. In either environment, higher inequality leads to a lower after‐tax return to capital, thereby reducing the economy's growth rate.     

Fiscal Competition and Growth When Capital Is Imperfectly Mobile*

Is tax competition good for economic growth? We address this question using a simple model of endogenous growth. Governments in a system of many small jurisdictions benevolently maximize the welfare of immobile residents. Quadratic (de‐)installation costs limit the mobility of capital. We look at optimal taxation and long‐run growth, and we analyse the effects of cost parameter variations on taxation and growth. A race to the bottom in capital tax rates is only one possibility; the relationship between capital mobility and capital tax rates is not monotonic. Growth and capital mobility are unambiguously positively related.     

R&D, Imperfect Competition and Growth with Human Capital Accumulation

This paper studies the long‐run consequences of imperfect competition on growth and the sectoral distribution of skills within an R&D‐based growth model with human capital accumulation. We find that steady‐state growth is driven only by incentives to accumulate skills. In the model imperfect competition has a positive growth effect, while influencing the allocation of human capital to the different economic activities employing this factor input. Contrary to general wisdom, the share of resources invested in R&D turns out not to be monotonically increasing in the product market power and its correlation with the equilibrium output growth rate is not unambiguous.     

HUMAN CAPITAL ACCUMULATION,HOME PRODUCTION AND EQUILIBRIUM DYNAMICS*

In this paper, we construct a three‐sector endogenous growth model in which long‐run growth is propelled by human capital accumulation. We show that although the addition of a home sector to the standard two‐sector endogenous growth model preserves the well‐behaved balanced growth equilibrium properties, it generates new transitional dynamics around the balanced growth path. It is shown that, when there is a positive shock to physical capital, our model is more likely to exhibit paradoxical growth than are standard multisector endogenous growth models that exclude home production. Our analysis adds new results to those from the related literature on leisure.     

社会资本的经济增长效应

全面而准确地探究社会资本对长期经济增长的影响机制,对提升社会资本在区域经济发展中的地位具有重大的现实意义,但传统的内生增长模型忽略了时间配置对社会资本积累与居民效用的影响.文章将社会资本积累过程内生化,构建了纳入社会资本的水平创新增长模型,综合考虑社会资本和闲暇时间对经济增长的非单调性影响,通过数值模拟发现:社会资本对经济增长具有边际效应递减的促进作用;而闲暇时间与经济增长之间呈现倒U形关系,即适当地增加闲暇时间有利于社会资本积累.文章还基于结构型社会资本的网络嵌入性特征,构建了地级市层面的社会资本测度指标,以验证社会资本具备生产要素的属性.实证结果表明:社会资本对经济增长具有显著的正向影响,其促进作用随着区域内城市经济发展水平的提高而提升;中西部地区社会资本的产出效率高于东部地区,从而间接反映了东部地区社会资本过度集聚的现状;投资水平与技术进步是社会资本影响经济增长的两条重要途径.上述结论为明晰社会资本的经济属性、激发社会资本的经济效益、推动城市集群协调发展以及缩小地区差异提供了有益的借鉴.     

Growth in fragile states in Africa: Conflict and post‐conflict capital accumulation

This article analyses the pattern of capital accumulation in Africa and its interaction with political fragility. Political fragility, defined as armed conflict or civil war, retards or reverses gains with respect to capital accumulation, slowing long‐term economic growth. Many countries experience negative rates of capital accumulation, particularly during periods of acute political instability. In post‐war periods, countries generally continue to experience capital destruction, lending support to the “war ruin hypothesis.” This has implications for long‐term economic growth in view of the strong association between capital accumulation and economic performance. The main policy implication of the analysis is that African countries and their international partners should pay more attention to capital accumulation, including capital reconstruction after periods of political instability, to lay the foundations for sustainable economic growth.     

Financial development and economic growth: long‐run equilibrium and transitional dynamics

We analyze the impact of financial development on economic growth. Differently from previous studies that focus mainly on balanced growth path outcomes, we also analyze the transitional dynamics of our model economy by using a finance‐extended Uzawa–Lucas framework where financial intermediation affects both human and physical capital accumulation. We show that, under certain rather general conditions, economic growth may turn out to be non‐monotonically related to financial development (as suggested by the most recent empirical evidence) and that too much finance may be detrimental to growth. We also show that the degree of financial development may affect the speed of convergence, which suggests that finance may play a crucial role in determining the length of the recovery process associated with exogenous shocks. Moreover, in a special case of the model, we observe that, under a realistic set of parameters, social welfare decreases with financial development, meaning that even when finance positively affects economic growth the short‐term costs associated with financial activities more than compensate their long‐run benefits.     

Distinguishing Between the Effects of Primary and Post-primary Education on Economic Growth

The paper follows Benhabib and Spiegel (Journal of Monetary Economics, Vol. 34, 1994:143–73) in examining the effect of human capital accumulation on economic growth. The paper is innovative in two ways. First, it takes the R&D‐based models more seriously. This delivers more structural specifications in which human capital affects growth as an input of final output and as a catalyst of technological innovation and imitation. Second, owing to data availability it is possible to disaggregate human capital and assign different roles to primary and post‐primary education. Regression estimates obtained from these alternative specifications suggest that the relative contribution of human capital to technology adoption and final output production vary by country wealth. More importantly, regression estimates suggest that primary education contributes mainly to production of final output, whereas post‐primary education contributes mainly to innovation and imitation of technology.     

Growth and Wage Inequality in a Dual Economy

Who benefits from economic growth? This paper analyses the distributional impact of different types of growth within a two‐sector model. The paper first presents necessary and sufficient conditions for unambiguous changes in wage inequality in a dual economy, based on analysis of the entire Lorenz curve. These conditions are then applied to the Harris–Todaro model with an urban non‐agricultural sector and rural agriculture. It is shown that capital accumulation or technical progress in agriculture can shift the Lorenz curve inwards and reduce wage inequality, while the effects of development in non‐agriculture are typically ambiguous.     

Stochastic accumulation of human capital and welfare in the Uzawa–Lucas model: an analytical characterization

Stochastic growth models are often solved numerically, because they are not tractable in general. However, recent several studies find the closed-form solution to the stochastic Uzawa–Lucas model in which technological progress or population dynamics follow a Brownian motion process with one or two parameter restriction(s). However, they assume that the return on the accumulation of human capital is deterministic, which is inconsistent with empirical evidence. Therefore, I develop the Uzawa–Lucas model in which the accumulation of human capital follows a mixture of a Brownian motion process and many Poisson jump processes, and obtain the closed-form solution. Moreover, I use it to examine the nexus between human capital uncertainty, technological progress, expected growth rate of human capital, and welfare.     

Exploring the Links Between Corruption and Growth

This paper models the transmission channels through which corruption indirectly affects growth. Results suggest that corruption hinders growth through its adverse effects on investment, human capital, and political instability, while fostering growth by reducing government consumption and, less robustly, increasing trade openness. Overall, a total negative effect of corruption on growth is estimated from these channels. These effects are found to be robust to modifications in model specification, sample coverage, and estimation techniques as well as tests for model exhaustiveness. The negative effect of corruption on growth is found to diminish in economies with low governance levels or a high degree of regulation. No one‐size‐fits‐all policy response appears supportable.