Induced Innovation,Endogenous Technical Change and Income Distribution in a Labor‐Constrained Model of Classical Growth

We present a steady state analysis of a labor‐constrained classical growth model with endogenous direction and intensity of technical change. Firms use retained profits to raise their productive capacity and to improve labor and capital productivities. Investments are planned to maximize instantaneous profits. Comparative dynamics exercises show that (1) an increase in the saving rate and in R&D subsidies raises the steady state labor share, labor productivity growth and the employment rate, and (2) a rise in workers' bargaining power reduces the employment rate while leaving productivity growth and distribution unaffected.     

Assessing long-term fiscal developments: A new approach

We use a new approach to assess long-term fiscal developments. By analyzing the time-varying behaviour of the two components of government spending and revenue - responsiveness and persistence -, a feature not captured by automatic stabilisers, we are able to infer about the sources of fiscal deterioration (improvement). Drawing on quarterly data, we estimate recursively these components within a system of government revenue and spending equations using a Three-Stage Least Square method for eight European Union countries plus the US. The results suggest that significant changes in the fiscal stance (including those related to the current crisis) are reflected in the estimates of persistence and responsiveness.     

Competition and the signaling role of prices

In a market where sellers are heterogeneous with respect to the quality of their good and are more informed than buyers, high quality sellers' chances to trade might depend on their ability to inform buyers about the quality of the goods they offer. We study how the strength of competition among sellers affects the ability of sellers of high quality goods to achieve communication by means of appropriate pricing decisions in the context of a market populated by a large number of strategic price-setting sellers and a large number of buyers. When competition among sellers is weak high quality sellers are able to use prices as a signaling device and this enables them to trade. By contrast, strong competition among sellers inhibits the role of prices as signals of high quality, and high quality sellers are driven out of the market.     

On the effect of obesity on employment in the presence of observed and unobserved confounding

The aim of this paper was to estimate the effect of obesity on the employment probability for Italian men and women accounting for both observed and unobserved confounding. We use microdata collected by the Italian National Statistical Office for the year 2009 during a multi‐scope survey of Italian households. The employment–obesity relationship is estimated after controlling for observed confounding by using probit regression and a propensity score weighting approach. To control for both observed and unobserved confounding (endogeneity), a semiparametric recursive bivariate probit model is employed instead. Our findings suggest that obesity has a significant negative effect on the employment probability and that endogeneity might not be an important issue.     

Lundberg parameters for non standard risk processes

We consider risk processes with delayed claims in a Markovian environment, and we study the asymptotic behaviour of finite and infinite horizon ruin probabilities under the small claim assumption. We also consider multivariate risk processes of the same kind, and we give upper and lower bounds for the Lundberg parameters of the corresponding total reserve. Our results have strong analogies with those one in the paper by Juri (Super modular order and Lundberg exponents, 2002).     

Influence of tourist sector structure on motivations of heritage tourists

Cultural tourism has traditionally been approached in terms of its appeal to visitors wishing to find out about or get involved in places or to extend their education or to enjoy historical buildings and heritage managed for tourism. This is tourism that has most encouraged activities to preserve the environment and historical/artistic heritage, getting away from mass tourist models, destination impact and seasonality. The aim of this study is to develop a model to identify the elements that help modify the cultural tourist's motivations: the structure of the tourism industry (enterprise infrastructure factors, city infrastructure factors, tourist mobility and tourist resources) and value for money. The use of partial least square method allows us to confirm the proposed correlations and to validate a model.     

Improving the outcomes of youth with medical limitations: Evidence from the National Job Corps Study

Improving work outcomes for youth with disabilities and reducing their reliance on disability benefits are important policy priorities, but existing interventions have shown limited promise. We provide new evidence to inform this discussion by re-analyzing data from the 1990s National Job Corps Study, a randomized field experiment conducted nationwide in the United States. Job Corps, which provides comprehensive training to economically disadvantaged youth, is the nation's largest youth program outside of the school system. We examine youth who had medical limitations when they enrolled in the experiment, a group that has not previously been studied. During the 4 years after random assignment, participation in Job Corps increased the earnings of youth with medical limitations—substantially more so than for youth without medical limitations—and additionally reduced their receipt of disability cash benefits. Interventions designed specifically for such youth have not typically demonstrated reductions in benefit receipt. Hence, our re-analysis of the field experiment suggests that Job Corps could be a promising model for helping some youth with disabilities gain a foothold in the labor market and achieve greater self-sufficiency.     

Aircraft safety analysis using clustering algorithms

In recent years, there have been many cost-benefit studies on aviation safety, which deal mainly with economic issues, omitting some strictly technical aspects. This study compares aircraft accidents in relation to the characteristics of the aircraft, environmental conditions, route, and traffic type. The study was conducted using a database of over 1500 aircraft accidents worldwide, occurring between 1985 and 2010. The data were processed and then aggregated into groups, using cluster analysis based on an algorithm of partition binary ‘Hard c means.’ For each cluster, the ‘cluster representative’ accident was identified as the average of all the different characteristics of the accident. Moreover, a ‘hazard index’ was defined for each cluster (according to annual movements); using this index, it was possible to establish the dangerousness of each ‘cluster’ in terms of aviation accidents. Obtained results allowed the construction of an easy-to-use predictive model for accidents using multivariate analysis.     

The Role of Stocks and Shocks Concepts in the Debate Over Price Versus Quantity

Recent literature showed that the choice between a price or quantity control depends, in part, on the dynamic structure of cost uncertainty. Temporary shocks to abatement cost favors the use of a price control, while permanent shocks favor a quantity control. Unfortunately, the importance of this assumption to the optimal choice has not yet received wide attention among economists. We analyze the regulatory sproblem in an alternative setting and reproduce these results. Our contribution is the simplicity of the model and the accessibility of the results, which reinforce the critical role played by the assumed structure of uncertainty.