Limited knowledge of demand and oligopoly equilibria

In a standard model of oligopoly with differentiated products, the existence of an equilibrium at which the first-order conditions for profit maximisation are simultaneously satisfied for all firms is proved and this is done without imposing any restrictions on the demand functions. This is an equilibrium in the following sense: although some firms may not necessarily be maximising their profits, nevertheless if each firm's knowledge of demand is limited to the linear approximation of its own demand curve, then it will believe that it is indeed maximising its profits.     

Did colonization matter for growth?: An empirical exploration into the historical causes of Africa's underdevelopment

We investigate the impact of 20th-century European colonization on growth. We find that colonial heritage, as measured by the identity of the metropolitan ruler and by the degree of economic penetration, matters for the heterogeneity of growth performances in Africa. Colonial indicators are correlated with economic and sociopolitical variables that are commonly employed to explain growth and there are growth gains from decolonization. Colonial indicators also add significant explanatory power to worldwide growth regressions and are correlated with the Sub-Saharan Africa and the Latin America dummies.     

How firms finance innovation. Further empirics from European SMEs

This paper aims to evaluate the role played by different sources of financing when analyzing firms' attitudes towards innovating. The empirical investigation is based on a large sample of European small and medium-sized enterprises (SMEs) observed over the period 2012–2017. Different measures of finance and several robustness checks are used to select a well-behaved probit model. The results show that the probability to innovate increases when firms use internal financing and grants. The same applies when funds come from family and friends, while no conclusive evidence is found for bank loans. Recommendations for public policy to encourage firm-tailored policies to promote investment in intangibles allow firms to benefit from innovation activities. European SMEs will also benefit from capital market developments and the advancement of new financial tools devoted to supporting innovation.     

Efficiency in banking: a meta-regression analysis

One learns two main lessons from studying the great quantity of banking efficiency literature. These lessons regard the heterogeneity in results and the absence of a comprehensive review aimed at understanding the reasons for this variability. Surprisingly, although this issue is well-known, it has not been systematically analyzed before. In order to fill this gap, we perform a Meta-Regression-Analysis (MRA) by examining 1661 efficiency scores retrieved from 120 papers published over the period 2000–2014. The meta-regression is estimated by using the Random Effects Multilevel Model (REML) because it controls for within- and between-study heterogeneity. The analysis yields four main results. First, parametric methods yield lower levels of banking efficiency than nonparametric studies. This holds true even after controlling for the approach used in selecting the inputs and outputs of the frontier. Secondly, we show that banking efficiency is highest when using the value-added approach, followed by estimates from studies based on the intermediation method, whereas those based on the hybrid approach are the lowest. Thirdly, efficiency scores are also determined by the quality of studies and the number of observations and variables used in the primary papers. As far as the effects of sample size, dimension and quality of papers are concerned, there are significant differences in sign and magnitude between parametric and nonparametric studies. Finally, cost efficiency is found to be higher than profit efficiency. Interestingly, MRA results are robust to the potential outliers in efficiency and sample size distributions.     

The economic analysis of offender’s choice: Old and new insights

The economics of crime has followed the basic Becker model (1968), according to which a criminal act results from a rational decision based on cost-benefit analysis. This paper surveys some extensions to Becker’s model, by giving some emphasis to earlier work that tries to explain differences in offender’s choice across places. At the end, the paper analyses the contribution of Steven Levitt (the new Gary Becker), which has stimulated an empirical renaissance in the economic analysis of crime. His new book (co-author Dubner) Freakonomics (2005) offers a new argument in understanding why crime fell in the 1990s in the USA. I am very grateful to an anonymous referee for his valuable comments, which improved the final version of this paper. I would also like to thank Steven Levitt for sending me his unpublished work. The usual disclaimer applies.     

De jure and de facto determinants of power: evidence from Mississippi

We evaluate the empirical effectiveness of de facto versus de jure determinants of political power in the U.S. South between the end of the nineteenth and the beginning of the twentieth century. Using previously-unexploited racially-disaggregated data on voter registration in Mississippi for the years 1896 and 1899, we show that the observed pattern of black political participation is driven by de facto disfranchisement as captured by the presence of a black political majority, which negatively affects black registration. The de jure provisions introduced with the 1890 state constitution and involving literacy tests and poll taxes exert a non-robust impact. Furthermore, a difference-in-differences approach shows that the decline in aggregate turnout pre-dates the introduction of de jure restrictions and confirms a causal effect of the presence of a black political majority. De jure restrictions intensify the influence of the latter after 1890, which suggests that the main effect of the constitutional reforms may have been an institutionalization of de facto disfranchisement.     

Imperfect information, Bayesian learning, and capital accumulation

This paper examines the consequences of informational imperfections for economic growth in an overlapping generations model in which agents learn the technological parameters in a Bayesian fashion. Under mild sufficient conditions, beliefs converge to the true value of the technological parameters. Nevertheless, even short-lived informational imperfections could have lasting effects, as they alter the long-run equilibrium levels of the capital stock. Therefore, learning dynamics may explain some of the observed differences in the performance of countries with otherwise similar economic characteristics.