Entrepreneurial Innovation and Sustained Long-run Growth without Weak or Strong Scale Effects

R&D-based growth theory suggests that a larger population size raises either the long-run rate of economic growth (“strong scale effect”) or the level of per capita income (“weak scale effect”), with far-reaching policy implications. However, for modern times there is little empirical support for strong scale effects and evidence in favor of weak scale effects is mixed, at best. This paper develops a simple overlapping-generations framework with endogenous occupational choice of heterogeneous agents and entrepreneurial innovations in which any form of scale effect is absent. A higher population growth rate has a negligible, possibly negative effect on the long-run growth rate of per capita income. Long-run growth is sustained also in absence of population growth and generally is policy-dependent.economic growth, endogenous technical change, entrepreneurial skills, population growth, scale effects

Firm Size and Diversification: Asymmetric Multiproduct Firms under Cournot Competition

A positive relationship between firm size and product diversification is a long-standing stylized fact. However, so far there is no appropriate theoretical model to explain the underlying forces of this observation. This paper analyzes an oligopoly model with asymmetric multiproduct frms, which is capable of addressing this issue. The model suggests that intangible assets of firms, which affect marginal costs or perceived quality of goods within a firm’s product line, play a key role for the empirical regularity that larger firms are more diversified.asymmetric equilibrium, diversification, firm size, intangible assets, multiproduct firms

Contest for Attention in a Quality-Ladder Model of Endogenous Growth

This paper develops a quality-ladder model of endogenous growth to study the interplay between in-house R&D and marketing expenditure. Although promotional activity is modelled as purely wasteful competition among firms for attention, it unambiguously fosters innovation activity of firms, and possibly, leads to faster growth. This result rests on two premises which are consistent with empirical evidence. First, if firms incur higher sunk costs for marketing, concentration and firm sizes rise. Second, firm size and R&D expenditure are positively related. As a result, R&D investments per firm may even become excessive, whereas being inefficiently low in the benchmark case without marketing. This has non-trivial consequences for the socially optimal policy design with respect to R&D subsidies and entry incentives.contest for attention, endogenous growth, innovation activity, marketing, R&D subsidies, scale effects

Entrepreneurial Innovation and Sustained Long-Run Growth without Weak or Strong Scale Effects

R&D-based growth theory suggests that a larger population size raises either the long-run rate of economic growth (“strong scale effect”) or the level of per capita income (“weak scale effect”), with far-reaching policy implications. However, for modern times there is little empirical support for strong scale effects and evidence in favor of weak scale effects is mixed, at best. This paper develops a simple overlapping-generations framework with endogenous occupational choice of heterogeneous agents and entrepreneurial innovations in which any form of scale effect is absent. A higher population growth rate has a negligible, possibly negative effect on the long-run growth rate of per capita income. Long-run growth is sustained also in absence of population growth and generally is policy-dependent.entrepreneurial skills, endogenous technical change, economic growth, population growth, scale effects

How to Promote R&D-based Growth? Public Education Expenditure on Scientists and Engineers versus R&D Subsidies

Empirical evidence suggests that positive externalities from R&D exceed negative ones. According to conventional wisdom, this calls for R&D subsidies. This paper develops a quality-ladder growth model with overlapping generations which evaluates the positive and normative implications of R&D subsidies and compares them with the effects of public education policy to promote R&D. Unlike standard growth models, the proposed framework accounts for the specificity of science and engineering (S&E) skills, where individuals endogenously choose the type of education, and allows for heterogeneity in individual ability. Although intertemporal knowledge spillovers are hypothesized and negative R&D externalities are absent, the analysis shows somewhat surprisingly that R&D subsidies may be detrimental to both productivity growth and welfare, in contrast to publicly provided education targeted to S&E skills. Finally, the optimal structure of public education spending on different skills is examined.education policy, endogenous growth, R&D subsidies, scientists and engineers, skill specificity

Risky Human Capital Investment, Income Distribution, and Macroeconomic Dynamics

This paper demonstrates that the role of the personal income distribution for an economy's process of development through risky human capital accumulation critically depends on the shape of the saving function. Empirical evidence for the U.S. strongly suggests that the marginal propensity to save is increasing in income, a property which so far has not been allowed for in the literature on human capital, income distribution and macroeconomics. Doing so, the present analysis suggests that the impact of higher inequality on the aggregate human capital stock, and thus, on growth is positive under rather weak conditions. Results heavily rely on a positive impact of parents. income on children's human capital investments, which holds under standard assumptions on labor income risk and risk aversion in the model, and is largely supported by empirical evidence.Growth, Income Distribution, Intergenerational Transfers, Risky Education, Saving Function.

Income Inequality, Voting Over the Size of Public Consumption, and Growth

According to a standard argument, higher income inequality fosters redistributive activities of the government in favor of the median income earner. This paper shows that if redistribution is achieved by a public provision of goods and services rather than by transfers, higher income inequality may imply a smaller size of the government in majority voting equilibrium. In addition to a static voting model, an endogenous growth model is analyzed to examine the role of saving decisions of heterogeneous individuals for both the distributional incidence of proportional factor income taxes and the voting outcome.income distribution, public consumption, majority voting, investment-driven growth

Growth, Development, and Technological Change

The theory of endogenous technical change has deeply contributed to our understanding of the fundamental sources of economic growth and development. In this chapter we survey important contributions in the field by focussing on the basic structure of endogenous growth models with horizontal as well as vertical innovation and emphasizing important implications for growth policy. We address issues like the scale effect problem, directed technological change to understand the evolution of wage inequality, long-run divergence between the innovating North and the imitating South due to inappropriate technology in the South, the relationship between trade and growth, competition and R&D, and the role of imperfect capital markets for R&D-based growth.endogenous technical change, economic growth, horizontal innovations, scale effects, vertical innovations

Should Continued Family Firms Face Lower Taxes than other Estates?

Inheritance taxes may induce heirs to discontinue family firms. Because firm dissolution incurs transaction costs, a preferential tax treatment of transferred family businesses seems to be desirable from a macroeconomic viewpoint. The support of dynastic succession, however, entails also a cost on the economy if firm continuation by less able heirs prevents entry into entrepreneurship. Here, we investigate analytically and quantitatively the trade-off between transaction costs saved and creative destruction prevented. We find that a unique general equilibrium exists at which, depending on the institutional setup, low-ability heirs either abandon (Type 1) or continue (Type 2) a family business. A calibration of the model with German data suggests that preferential tax treatment of family firms has severe negative consequences on macroeconomic performance if it causes a threshold crossing from Type 1 to Type 2 equilibrium. It also reveals that the targeted persons, i.e. the entrepreneurs that are caused to continue a business, always lose relative to their status in an economy without continuation-friendly tax policy.bequest taxation, creative destruction, entrepreneurship, family firms, preferential tax treatment

Ideological Polarization, Sticky Information, and Policy Reforms

We develop a dynamic two-party political economy framework, in which parties seek to maximize vote share and face the trade-off between catering to their respective core constituencies on the one hand and ‘middle of the road’ voters with no partisan affiliation on the other hand. In contrast to ideology-driven individuals, ‘middle of the road’ voters care about the state of the economy in the sense that a policy reform is desirable for them when the fundamentals of the economy change. However, information is “sticky” in the sense that the process of information diffusion about the state of the economy, which is determined by some exogenous stochastic process, is imperfect. Contrary to conventional wisdom, we show that an increase in ideological polarization may enhance social welfare by mitigating the friction in information flow.ideological polarization, sticky information, partisanship, policy reform