Internal Increasing Returns to Scale and Economic Growth

This study develops a model of endogenous growth based on increasing returns due to firms' technology choices. Particular attention is paid to the implications of these choices, combined with the substitution of capital for labor, on economic growth in a general equilibrium model in which the R&D sector produces machines to be used for the sector producing final goods. We show that incorporating oligopolistic competition in the sector producing finals goods into a general equilibrium model with endogenous technology choice is tractable, and we explore the equilibrium path analytically. The model illustrates a novel manner in which sustained per capita growth of consumption can be achieved -- through continuous adoption of new technologies featuring the substitution between capital and labor. Further insights of the model are that during the growth process, the size of firms producing final goods increases over time, the real interest rate is constant, and the real wage rate increases over time.

Internal Increasing Returns to Scale and Economic Growth

This study develops a model of endogenous growth based on increasing returns due to firms' technology choices. Particular attention is paid to the implications of these choices, combined with the substitution of capital for labor, on economic growth in a general equilibrium model in which the R&D sector produces machines to be used for the sector producing final goods. We show that incorporating oligopolistic competition in the sector producing finals goods into a general equilibrium model with endogenous technology choice is tractable, and we explore the equilibrium path analytically. The model illustrates a novel manner in which sustained per capita growth of consumption can be achieved?through continuous adoption of new technologies featuring the substitution between capital and labor. Further insights of the model are that during the growth process, the size of firms producing final goods increases over time, the real interest rate is constant, and the real wage rate increases over time.

The Choice of Technology and Rural-Urban Migration in Economic Development

This paper studies a general equilibrium model of rural-urban migration in which manufacturing firms engage in oligopolistic competition and choose increasing returns technologies to maximize profits. Urban residents incur commuting costs to work in the Central Business District. Surprisingly a change in the size of the population or an increase in the exogenously given wage rate will not affect a manufacturing firm’s choice of technology. This helps to explain why firms in developing countries may not adopt labor intensive technologies even under abundant labor supply. An increase in the number of manufacturing firms increases both the employment rate and the level of employment in the manufacturing sector. However, manufacturing firms choose less advanced technologies. Capital accumulation leads manufacturing firms to choose more advanced technologies, but may not increase employment in the manufacturing sector

International Trade with Increasing Returns in the Transportation Sector

In this general equilibrium framework, the transportation sector is modeled as a distinct sector with increasing returns. A more advanced technology has a higher fixed cost but a lower marginal cost of production. Even with both manufacturing firms and transportation firms engaged in oligopolistic competition and optimally choosing their technologies, the model is tractable and results are derived analytically. Technology adoptions in the manufacturing sector and transportation sector are reinforcing, and multiple equilibria may exist. Firms choose more advanced technologies and the prices decrease when the size of the population is larger

Culture, institutions, and long-run performance

If institutions are essential for long-run performance, why don’t developing countries adopt institutions in developed countries to become rich? In this dynamic model, culture affects a ruler’s institutional choice, while culture itself evolves endogenously. Multiple stable steady states are possible, and even similar initial conditions can lead to dramatically different steady states. The state of Qin’s unification of China in 221 BC is used to illustrate the model. In one steady state, consistent with what happened in the state of Qin, individuals value material incentives. Qin did not strictly practice the patriarchal clan system advocated by Confucianism. Qin adopted Legalist institutions under which government officials were chosen by merit, and Qin culture was further shaped by Legalism. In another steady state, consistent with what happened in states other than Qin, individuals value loyalty and family values. Those states chose not to adopt Legalist institutions comprehensively for fearing that inconsistencies between culture and institutions could lead to internal rebellions even though institutional reforms would increase their military power. Other cases of how the interdependence between culture and institutions affects performance are also discussed

The Choice of Technology and Equilibrium Wage Rigidity

In this general equilibrium model, firms engage in oligopolistic competition and choose increasing returns technologies to maximize profits. Capital and labor are the two factors of production. The existence of efficiency wages leads to unemployment. The model is able to explain some interesting observations of the labor market. First, even though there is neither long-term labor contract nor costs of wage adjustment, wage rigidity is an equilibrium phenomenon: an increase in the exogenous job separation rate, the size of the population, the cost of exerting effort, and the probability that shirking is detected will not change the equilibrium wage rate. Second, the equilibrium wage rate increases with the level of capital stock. Third, a higher level of capital stock does not necessarily reduce the unemployment rate. That is, there is no monotonic relationship between capital accumulation and the unemployment rate

Intermediate Inputs and External Economies

Is the degree of external economies (at the industry level) higher than the degree of internal increasing returns (at the firm level)? If so, what is the exact source of this difference? In the general equilibrium model in which firms producing final goods choose the degree of specialization of their technologies, external economies arise from the usage of intermediate inputs and the existence of internal increasing returns. It is frequently assumed that increasing returns are absent at the firm level while present at the industry level. In this model, the existence of increasing returns at the firm level is necessary for the existence of external economies at the industry level. We show that the degree of external economies increases with the level of linkage effects. However, a higher linkage effect does not always lead firms to choose more specialized technologies

Intra-Firm Specialization, Income Distribution, and International Trade

The impact of international trade on a firm’s degree of specialization and income distribution is studied in a general equilibrium framework in which firms engage in oligopolistic competition. International trade increases a firm’s degree of specialization, but the number of goods a country produces may not change. Trade may lower the welfare of the scarce factor of production. Sufficient conditions for a country’s welfare to increase with trade are provided

Coordination Costs, Market Size, and the Choice of Technology

Impact of coordination costs and market size on a firm’s choice of technology is studied in a general equilibrium model in which firms engage in oligopolistic competition. A firm establishes an organizational hierarchy to coordinate its production. First, it is shown that an increase in market size leads a firm to choose a more specialized technology. Second, surprisingly, a robust result is that an increase in the level of coordination efficiency leads a firm to choose a less specialized technology

Unemployment and Economic Integration for Developing Countries

While financial or trade integration between countries may increase the size of the market and aid the adoption of more advanced technologies, will it also increase the level of urban unemployment for a developing country? In this model, there is unemployment in the urban sector. Manufacturing firms engage in oligopolistic competition and choose increasing returns technologies to maximize profits. Financial firms provide capital to manufacturing firms and they also engage in oligopolistic competition. We show that an increase in the wage rate in the manufacturing sector changes neither the level of technology nor the level of employment in the manufacturing sector. While financial or trade integration between developing countries leads manufacturing firms to adopt more advanced technologies, the level and rate of employment in the manufacturing sector will not deteriorate