Growth, Sectoral Composition, and the Wealth of Nations

We characterize the dynamic equilibrium of a two-sector endogenous growth model with constant returns to scale. We assume that both sectors produce consumption and investment goods, and we introduce a minimum consumption requirement. In this model, economies with the same fundamentals but different endowments of capitals will converge to a common growth rate, although the long run level and sectoral composition of GDP will be different. Because total factor productivity depends on sectoral composition, capital endowments will also contribute to GDP by means of changing the sectoral composition. This suggests that the development accounting exercises should consider the endogeneity of total factor productivity when measuring the contribution of capital to GDP. Along the transition, the slope of the policy functions depends on the initial values of the capital stocks and of the minimum consumption requirement. This implies that the minimum consumption is a barrier to development and that economies initially similar may diverge along the transition.sectorial composition, human capital, endogenous growth, two-sector growth model

Welfare Implications of the Interaction between Habits and Consumption Externalities

We analyze the welfare properties of the equilibrium path of a growth model where both habits and consumption externalities affect the utility of consumers. Our analysis highlights the crucial role played by complementarities between externalities and habits in order to generate an inefficient dynamic equilibrium. In particular, we show that the competitive equilibrium is inefficient when consumption externalities and habit adjusted consumption are not perfect substitutes.Habit formation, consumption externalities

Aspirations, Habit Formation, and Bequest Motive

We analyze how the presence of endogenous preferences affects the altruistic bequest motive from parents to children. We will show that the existence of habits raises the threshold value of the intergenerational discount factor above which altruistic bequests are positive, while aspiration formation could push this value down. Therefore, the dynamic inefficiency of the economy with no altruism is not sufficient to prevent the bequest motive from being operative under aspiration formation. We also discuss the implications of public debt when the bequest motive is inoperative and preferences exhibit habit and aspiration formation.Aspirations, Habits, Bequests

Estate Taxes, Consumption Externalities, and Altruism

We study how the introduction of consumption externalities affects the efficiency of the dynamic equilibrium in an economy displaying dynastic altruism. When the bequest motive is inoperative consumption externalities affect the intertemporal margin between young and old consumption and thus modify the intertemporal path of consumption and capital. The optimal tax policy that solves this intertemporal inefficiency consists of a tax on capital income and a pay-as-you-go social security system. The later solves the overaccumulation of capital due to the inoperativeness of the bequest motive and the former solves the inefficient allocation of consumption due to consumption externalities. When the bequest motive is operative consumption externalities only cause an intratemporal inefficiency that affects the allocation of consumption between the generations living in the same period but do not affect the optimality of the capital stock level. This suboptimal allocation of consumption implies in turn that the path of bequest is also suboptimal. The optimal tax policy in this case consists of an estate tax and a capital income tax. The estate tax corrects the intratemporal inefficiency but generates an intertemporal inefficiency which is corrected by means of an appropriate capital income tax.Consumption externalities, bequests, optimal tax rates

Consumption Externalities, Habit Formation, and Equilibrium Efficiency

We analyze the welfare properties of the competitive equilibrium in a capital accumulation model where individual preferences are subjected to both habit formation and consumption spillovers. We also discuss how consumption externalities and habits interact to generate an inefficient dynamic equilibrium. Finally, we characterize optimal tax policies aimed to restore efficient decentralized paths.Habit Formation, Consumption Externalities, Equilibrium Efficiency

Sectoral composition and macroeconomic dynamics

We analyze the transitional dynamics of a model with heterogeneous consumption goods. In this model, convergence is driven by two different forces: the typical diminishing returns to capital and the sectoral change inducing the variation in relative prices. We show that this second force affects the growth rate if the two consumption goods are not Edgeworth independent and if these two goods are pro- duced with technologies exhibiting different capital intensities. Because the afore- mentioned dynamic sectoral change arises only under heterogeneous consumption goods, the transitional dynamics of this model exhibits striking differences with the growth model with a single consumption good. We also show that these differences in the transitional dynamics can give raise to large discrepancies in the welfare cost of shocks between the economy with a unique consumption good and the economy with multiple consumption goods.multi-sector growth models, transitional dynamics, consumption growth.

Can consumption spillovers be a source of equilibrium indeterminacy?

In this paper, we show that consumption externalities are a source of equilibrium indeterminacy in a growth model with endogenous labor supply. In particular, when the marginal rate of substitution between own consumption and the others' consumption is constant along the equilibrium path, the equilibrium does not exhibit indeterminacy. In contrast, when that marginal rate of substitution is not constant, the equilibrium may exhibit indeterminacy even if the elasticity of the labor demand is smaller than the elasticity of the Frisch labor supply.Consumption externalities, equilibrium efficiency, indeterminacy

Labor mobility, structural change and economic growth

This paper develops a two-sector growth model in which the process of structural change in the sectoral composition of employment and GDP is jointly determined by non-homothetic preferences and labor mobility cost. This cost, paid by workers moving to another sector, limits structural change. Our model can explain the following patterns of development of the US economy throughout the period 1880-2000: (i) balanced growth of the aggregate variables in the second half of the last century; (ii) structural change in the sectoral composition of employment between agriculture and non-agriculture sectors; (iii) structural change process in the sectoral composition of GDP between these sectors; and (iv) wage convergence between the two sectors. We outline that the last two patterns can only be explained if labor mobility cost is introduced. Results reveal that mobility cost generates a misallocation of production factors. This implies a loss of GDP which amounts to over 30% of the GDP throughout initial periods according to the calibrated model. During the transition, the loss of GDP decreases and eventually vanishes. Thus, the elimination of the misallocation explains part of the increase in the GDP. Additionally, this study points out that misallocation introduces a mechanism through which cross-country differences in sectoral composition may account for cross-country income differences

Anatomizing incomplete-markets small open economies: policy trade-offs and equilibrium determinacy

We propose a simple incomplete-markets small-open-economy model that is amenable to analytical dissection of its policy-relevant mechanisms. In contrast to its complete-markets limit, the equilibrium real exchange rate is irreducible from the incomplete-markets equilibrium. Market incompleteness exacerbates the domestic-inflation and output-gap monetary-policy trade-off in two ways: its steepness and its resulting endogenous cost-push to the trade-off. The latter depends on an equilibrium combination of structural shocks and on agents' beliefs of future events. Thus, in comparison to its complete-markets and closed-economy limits, standard Taylor-type rules are less capable of inducing determinate rational expectations equilibrium in our environment. Despite the larger policy trade-off under incomplete markets, simple policies that also respond to exchange-rate growth are able to manage expectations that drive the endogenous cost-push term. However, policies that respond directly to expectations may turn out to exacerbate the cost-push trade-off further, and thus, to be more likely to fuel self-fulfilling multiple or unstable equilibria

Labor mobility, structural change and economic growth

This paper develops a two-sector growth model in which the process of structural change in the sectoral composition of employment and GDP is jointly determined by income effects, derived from non-homothetic preferences, and by a substitution mechanism derived from a labor mobility cost. This cost, paid by workers moving to another sector, generates a sectoral wage gap that limits structural change. Our model can explain the following patterns of development of the US economy throughout the period 1880-2000: (i) balanced growth of the aggregate variables in the second half of the last century; (ii) structural change in the sectoral composition of employment between agricultural and non-agricultural sectors; (iii) structural change process in the sectoral composition of GDP between these sectors; and (iv) wage convergence between the two sectors. We outline that in the absence of wage gaps the model is not able to jointly explain the process of structural change in the sectoral composition of both GDP and employment. This cost reduces the Possibilities Production Frontier (PPF) by constraining the sectoral allocation of production factors. This implies a loss of GDP which amounts to over 30% of the GDP throughout initial periods according to the calibrated model. During the transition, the loss of GDP decreases and eventually vanishes. Thus, the elimination of this technological constraint explains part of the increase in the GDP. Additionally, this study points out that the aforementioned technological constraint introduces a mechanism through which cross-country differences in sectoral composition may account for cross-country income differences