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AbstractEmploying an overlapping generations model of R&D‐based growth with labour market frictions, this paper examines how employment changes induced by labour market frictions influence asset bubbles and long‐run economic growth. Asset bubbles can (cannot) exist when the employment rate is high (low), which leads to higher (lower) economic growth through labour market efficiency. We also explore the steady state and transitional dynamics of bubbles, economic growth and employment. Furthermore, we show that policy or parameter changes with a negative influence on the labour market can lead to a bubble burst.

We develop an aggregate demand analysis of a small open economy based on all agents' dynamic optimization. Murota and Ono (2015) present a simple Keynesian cross analysis with dynamic optimization. This paper extends it to a small-country setting with two factors and two commodities, of which the structure is as simple as the conventional Keynesian cross analysis. We apply the model to examine the effects of changes in various parameters, such as the terms of trade, foreign asset holdings and government purchases, on aggregate demand. They are quite different from those under full employment and those of the Mundell-Fleming model.

AbstractEmploying an overlapping generations model of R&D‐based growth with endogenous fertility and education decisions, we examine how demographic changes induced by an increase in life expectancy influence the long‐run growth rate of the economy. We demonstrate that life expectancy, when relatively low (high), positively (negatively) affects economic growth. This paper also compares the growth implications of child education subsidy policies (i.e., policies for enhancing basic education) and child rearing subsidy policies (i.e., pro‐natal policies) and demonstrate that while the child education subsidies consistently foster economic growth, child rearing subsidies may negatively affect economic growth.

This paper studies the relationship between geographic patterns of industry and economic growth without scale effects. Facing transport costs and imperfect knowledge diffusion, firms locate production, process innovation and product development in their lowest cost regions, leading to the partial concentration of production and full agglomeration of innovation in the region with the largest market. An increase in industry concentration raises knowledge spillovers from production to innovation, causing a fall (rise) in market entry, if labour productivity improves more for process innovation (product development). The rate of economic growth rises or falls, depending on how industry concentration affects market entry.

We theoretically analyze the effects of a child allowance, an improvement in the efficiency of child rearing and a labor income tax on the fertility rate and per capita consumption. The effects on per capita consumption are opposite in the absence, and the presence, of unemployment. For example, a child allowance urges people to have more children and allocate more labor to child rearing, decreasing labor supply for the purpose of commodity production. Therefore, under full employment, it decreases per capita consumption. In the presence of unemployment, however, it reduces the deflationary gap and hence stimulates per capita consumption.

A tractable model with infinitely lived agents is constructed for the examination of bubbles and unemployment. It is demonstrated that the presence of bubbles stimulates capital accumulation and reduces unemployment. The presence of bubbles also changes the effects of government policies that target unemployment and welfare conditions in the labor market. The main findings are as follows: (i) the presence of bubbles is more beneficial to an economy with severe credit constraints; (ii) the presence of bubbles mitigates the negative effects of taxation and unemployment benefits on unemployment and welfare; and (iii) these mitigation effects decrease as credit constraints are relaxed.