Innovation and productivity in the food vs. the high-tech manufacturing sector

ABSTRACT

The food sector is considered a mature industry characterized by low research and development (R&D) intensity. Nevertheless, food companies face numerous challenges and cannot do without innovation activity if they want to keep their competitiveness. In this study, we examine the impact of innovation on labor productivity in European food companies and compare it to results for firms operating in high-tech sectors. The central motivation of our study is that the low R&D intensity observed in the food sector should be mirrored in different productivity effects of innovation when compared to the high-tech sector. We use microdata from the European Union's ‘Community Innovation Survey’ (CIS) and apply an endogeneity-robust multi-stage model that has been applied by various recent studies. Our results point out major differences between the examined subsectors. While we find strong positive effects of innovation on labor productivity for food firms, we find insignificant effects in the high-tech sector. This might suggest that the returns to innovation might be best evaluated separately by sector rather than for the manufacturing sector as a whole.     

PUBLIC ENTERPRISES AND LABOR MARKET PERFORMANCE*

This article shows that state control of some industries may have contributed to the increase in European unemployment from the 1970s to the early 1990s. We develop a simple two‐sector model, one privately run and one publicly run, that has risk‐averse workers directing their search into one of the sectors. Assuming that the privately run sector is less able to insure its employees against uncertainty, we show that aggregate unemployment in this economy increases in response to an increase in economic turbulence.     

Law, trade, and development

This paper uses a Ricardian model to generate predictions about the influence of institutions on trade in differentiated (complex) and commoditized (simple) products and then uses a rich international trade data set for empirical tests. The model draws the distinction between the role of international transaction costs and domestic production costs in the trade of complex and simple products. The effects of institutions predicted by the model are identified with a three-step estimation procedure. We find that when countries have low quality institutions, institutional reform primarily influences production costs and has little influence on the volume of trade. Institutional reform, however, increases the diversity of exports in complex goods markets. Conversely, in countries with more developed institutions, institutional reform primarily influences transaction costs and is associated with gains in the volume and the diversity of complex exports.     

A SHORT NOTE ON SECOND-ORDER STOCHASTIC DOMINANCE PRESERVING COHERENT RISK MEASURES

We improve results on law invariant coherent risk measures satisfying the Fatou property due to Kusuoka (2001; Adv. Math. Econ . 3, 83–95) by considering risk measures which are in addition second order stochastic dominance preserving. In particular, we derive a representation result for such risk measures.     

TERM STRUCTURES OF IMPLIED VOLATILITIES: ABSENCE OF ARBITRAGE AND EXISTENCE RESULTS

This paper studies modeling and existence issues for market models of stochastic implied volatility in a continuous-time framework with one stock, one bank account, and a family of European options for all maturities with a fixed payoff function h . We first characterize absence of arbitrage in terms of drift conditions for the forward implied volatilities corresponding to a general convex h . For the resulting infinite system of SDEs for the stock and all the forward implied volatilities, we then study the question of solvability and provide sufficient conditions for existence and uniqueness of a solution. We do this for two examples of h , namely, calls with a fixed strike and a fixed power of the terminal stock price, and we give explicit examples of volatility coefficients satisfying the required assumptions.     

LONG HORIZONS,HIGH RISK AVERSION,AND ENDOGENOUS SPREADS

For an investor with constant absolute risk aversion and a long horizon, who trades in a market with constant investment opportunities and small proportional transaction costs, we obtain explicitly the optimal investment policy, its implied welfare, liquidity premium, and trading volume. We identify these quantities as the limits of their isoelastic counterparts for high levels of risk aversion. The results are robust with respect to finite horizons, and extend to multiple uncorrelated risky assets. In this setting, we study a Stackelberg equilibrium, led by a risk‐neutral, monopolistic market maker who sets the spread as to maximize profits. The resulting endogenous spread depends on investment opportunities only, and is of the order of a few percentage points for realistic parameter values.     

Managerial decision making in customer management: adaptive, fast and frugal?

While customer management has become a top priority for practitioners and academics, little is known about how managers actually make customer management decisions. Our study addresses this gap and uses the adaptive decision maker as well as the fast and frugal heuristics frameworks to gain a better understanding of managerial decision making. Using the process-tracing tool MouselabWEB, we presented sales managers in retail banking with three typical customer management prediction tasks. The results show that a majority of managers in this study are adaptive in their decision making and that some managers use fast and frugal heuristics. Usage of adaptive decision making seems to be mainly driven by low objective task difficulty, the use of fast and frugal heuristics by experience. While adaptive decision making does not impact predictive accuracy, usage of fast and frugal heuristics is associated with proportionally greater use of high predictive quality cues and a significant increase in accuracy. Hence, the existing skepticism concerning heuristics should be questioned.