Shantayanan Devarajan

The composition of public expenditure and economic growth

Noting that the literature has focused on the link between the level of public expenditure and growth, we derive conditions under which a change in the composition of expenditure leads to a higher steady-state growth rate of the economy. The conditions depend not just on the physical productivity of the different components of public expenditure but also on the initial shares. Using data from 43 developing countries over 20 years we show that an increase in the share of current expenditure has positive and statistically significant growth effects. By contrast, the relationship between the capital component of public expenditure and per-capita growth is negative. Thus, seemingly productive expenditures, when used in excess, could become unproductive. These results imply that developing-country governments have been misallocating public expenditures in favor of capital expenditures at the expense of current expenditures.

The Long-Run Economic Costs of AIDS: Theory and an Application to South Africa

Most existing estimates of the macroeconomic costs of AIDS, as measured by the reduction in the growth rate of gross domestic product, are modest. For Africa-the continent where the epidemic has hit the hardest-they range between 0.3 and 1.5 percent annually. The reason is that these estimates are based on an underlying assumption that the main effect of increased mortality is to relieve pressure on existing land and physical capital so that output per head is little affected. The authors argue that this emphasis is misplaced and that, with a more plausible view of how the economy functions over the long run, the economic costs of AIDS are almost certain to be much higher. Not only does AIDS destroy existing human capital, but by killing mostly young adults, it also weakens the mechanism through which knowledge and abilities are transmitted from one generation to the next. The children of AIDS victims will be left without one or both parents to love, raise, and educate them. The model yields the following results. In the absence of AIDS, the counterfactual benchmark, there is modest growth, with universal and complete education attained within three generations. But if nothing is done to combat the epidemic, a complete economic collapse will occur within three generations. With optimal spending on combating the disease, and if there is pooling, growth is maintained, albeit at a somewhat slower rate than in the benchmark case in the absence of AIDS. If pooling breaks down and is replaced by nuclear families, growth will be slower still. Indeed, if school attendance subsidies are not possible, growth will be distinctly sluggish. In all three cases, the additional fiscal burden of intervention will be large, which reinforces the gravity of the findings.

Goals for Development: History, Prospects, and Costs

The Millennium Development Goals set quantitative targets for poverty reduction and improvements in health, education, gender equality, the environment, and other aspects of human welfare. At existing rates of progress many countries will fall short of these goals. However, if developing countries take steps to improve their policies and increased financial resources are made available, significant additional progress toward the goals is possible. The suthors provide a preliminary estimate of the additional financial resources which would be required if countries would work vigorously toward meeting the Millennium Development Goals. Two estimates of the resource gap are developed, one by estimating the additional resources necessary to increase economic growth so as to reduce income poverty, the other by estimating the cost of meeting specific goals in health, education, and the environment. Both estimates yield a figure in the range of

Decentralization and Service Delivery

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The ‘Dutch’ disease in a developing country: Oil reserves in Cameroon☆

70 billion in additional assistance per year, which is in line with estimates from other international development agencies and which would roughly represent a doubling of official aid flows over 2000 levels. While the authors believe this is a reasonable first approximation of the costs associated with achieving the Millennium Development Goals, it should be interpreted with caution for several reasons, including the lack of empirical data in many countries to estimate the relationship between expenditures on health or education and related outcomes, or the relationship between investment and growth, the sensitivity of the results to changes in the policy environment (both at the macroeconomic and sector level, and with respect to international trade), and opportunities for increased-and more efficient-domestic resource mobilization.

The Simplest Dynamic General-Equilibrium Model of an Open Economy

Dissatisfied with centralized approaches to delivering local public services, a large number of countries are decentralizing responsibility for these services to lower-level, locally elected governments. The results have been mixed. The paper provides a framework for evaluating the benefits and costs, in terms of service delivery, of different approaches to decentralization, based on relationships of accountability between different actors in the delivery chain. Moving from a model of central provision to that of decentralization to local governments introduces a new relationship of accountability-between national and local policymakers-while altering existing relationships, such as that between citizens and elected politicians. Only by examining how these relationships change can we understand why decentralization can, and sometimes cannot, lead to better service delivery. In particular, the various instruments of decentralization-fiscal, administrative, regulatory, market, and financial-can affect the incentives facing service providers, even though they relate only to local policymakers. Likewise, and perhaps more significantly, the incentives facing local and national politicians can have a profound effect on the provision of local services. Finally, the process of implementing decentralization can be as important as the design of the system in influencing service delivery outcomes.

Low Investment is Not the Constraint on African Development

Abstract Noting that most of the literature on the ‘Dutch disease’ refers to developed countries, this paper looks at the impact of an oil boom on a developing country. When certain features of developing countries – particularly the imperfect substitutability between domestic and imported goods – are incorporated, one of the standard Dutch disease results can be reversed: not all the traded goods sectors will contract. A simulation with a computable general equilibrium model of Cameroon reveals that the agricultural sector is most likely to be hurt, whereas some of the manufacturing sectors will benefit. This suggests possible areas for government intervention, should it be warranted, and may explain the differential performance between the agricultural and industrial sectors of oil exporting countries in the post-1973 period.

Pro-Competitive Effects of Trade Reform: Results from a CGE Model of Cameroon

Abstract This paper presents the simplest possible general-equilibrium model of an open economy in which producer and consumer decisions are both intra- and intertemporally consistent. Consumers maximize the present value of the utility of consumption; producers maximize the present value of profits. The model solves for the set of intertemporally consistent prices. The parsimonious structure of the model is achieved by dividing the economy into two producing sectors—exports and domestic goods—and two consumed goods—imports and domestic goods. As a result, there is only one endogenous price per period to be solved for (the price of the domestic good), although “structural” questions, such as the evolution of the real exchange rate, can be posed with the model. Furthermore, with this structural breakdown, the model can be calibrated with national accounts data only. In the paper, we show how to calibrate such a model (including specification of an adjustment-cost function, to avoid “bang-bang” behavior) and use the model to examine various questions where intertemporal issues are important, including terms-of-trade shocks and tariff reform.

THE INFLUENCE OF COMPUTABLE GENERAL EQUILIBRIUM MODELS ON POLICY

While many analysts decry the lack of sufficient investment in Africa, we find no evidence that private and public investment are productive, either in Africa as a whole (unless Botswana is included in the sample), or in the manufacturing sector in Tanzania. In this restricted sense, inadequate investment is not the major obstacle to African economic development.

The combined incidence of taxes and public expenditures in the Philippines

How likely is trade liberalization to produce efficiency gains in the presence of imperfect competition, scale economies, and higher-than-average wages in the modern sectors -- all common features of developing economies? These features create a potential conflict to the extent that traditional notions of comparative advantage would lead us to expect that the modern sectors will be squeezed with liberalization. In this paper we investigate the issue by using an applied general equilibrium model calibrated to Cameroonian data. Under perfect competition, the traditional expectations are borne out: manufacturing sectors on the whole contract, and the cash crops sector (mainly coffee and cocoa) is the main beneficiary; the welfare effect is a wash since the beneficial consequence of expanded imports is offset by labor being pulled away from the modern, high-wage sectors. By contrast, under imperfect competition (in the modern sectors only), trade liberalization produces welfare gains of the order of 1 to 2 percent of real income. The key is the pro-competitive effect of liberalization: domestic firms now perceive themselves as facing a higher elasticity of demand, which spurs them to increase production. Therefore, the modern sectors do much better in terms of output than in the perfectly competitive benchmark. The introduction of scale economies amplifies these results. Under reasonable circumstances imperfect competition will make liberalization more desirable, even in the absence of firm entry and exit.