The CES Production Function,the accounting identity,and Occam's razor

This paper reconsiders the argument that empirical estimations of aggregate production functions may be interpreted merely as statistical artefact. The reason is that Occam's razor, or Herbert Simon's principle of parsimony, suggests that the aggregate production function, together with the side equations derived from the usual neoclassical optimizing conditions, simply reflect the underlying accounting identity that value added definitionally equals the wage bill plus total profits. This argument is illustrated with respect to the empirical evidence presented by Arrow, Chenery, Minhas and Solow (Review of Economics and Statistics, XLIII, 225-50, 1961) and which led them to derive the Constant Elasticity of Substitution aggregate production function. It is shown that their results are more parsimoniously explained with reference to the underlying accounting identity than to any technological relationship.     

Minimum variance hedging when spot price changes are partially predictable

In many markets, changes in the spot price are partially predictable. We show that when this is the case: (1) although unbiased, traditional regression estimates of the minimum variance hedge ratio are inefficient, (2) estimates of the riskiness of both hedged and unhedged positions are biased upward, and (3) estimates of the percentage risk reduction achievable through hedging are biased downward. For natural gas cross hedges, we find that both the inefficiency and bias are substantial. We further find that incorporating the expected change in the spot price, as measured by the futures-spot price spread at the beginning of the hedge, into the regression results in a substantial increase in efficiency and reduction in the bias.     

Corporate social responsibility perception in business students as future managers: a multifactorial analysis

This paper examines undergraduate business students' perception of corporate social responsibility (CSR) in cases in which they have not attended any specific course either dealing with CSR or providing training in ethics. A survey was conducted of 535 Spanish business students as future managers. The results show that the stakeholders' perspective deserves a huge attention for those students considering what the keys of business success are. Significant differences in perception were nevertheless identified when a multifactorial analysis was undertaken. Female students are more concerned about CSR issues. The maximization of value for shareholders is less valued by second‐ and third‐year students than by first‐year ones. The findings point to a number of important orientations for the future development of university curriculum.     

Correcting for biases when estimating production functions: an illusion of the laws of algebra?

This paper shows that the endogeneity bias that allegedly appearswhen estimating production functions using value data, and whichthe literature has tried to deal with since the 1940s, is simplythe result of omitted-variable bias due to a poor approximationto an accounting identity. This problem has no econometric solution.As a result, recent attempts to solve the problem by developingnew estimators are questioned. The only possible way to estimatethe technological parameters of the production function is touse physical quantities.     

Not paying dividends? A decomposition of the decline in dividend payers

Current payout policy literature contends that firms’ propensity to pay dividends declined between 1978 and 1998. Using the Oaxaca decomposition methodology, we measure changes in the propensity to pay dividends between 1978 and 1998. Results suggest that firms today have only a slightly lower propensity to pay dividends. Furthermore, when we also categorize firms that use stock repurchases as dividend payers, we find that 100% of the decline in the proportion of dividend payers can be explained by changes in firm characteristics only. The difference is that firms that firms are now repurchasing stock instead of paying dividends.     

WHY ARE SOME COUNTRIES RICHER THAN OTHERS? A SKEPTICAL VIEW OF MANKIW–ROMER–WEIL's TEST OF THE NEOCLASSICAL GROWTH MODEL

This paper provides evidence of a problem with the influential testing and assessment of Solow's (1956) growth model proposed by Mankiw et al. (1992). It is shown that when the assumption of a common rate of technical progress is relaxed in the neoclassical model, the goodness of fit of Mankiw et al.’s equation improves dramatically. However, and more importantly, it is shown that this result, as well as the magnitude of estimates obtained, merely reflects a statistical artifact. This has serious implications for the possibility of actually testing Solow's growth model.     

Forward-premium puzzle: is it time to abandon the usual regression?

The forward premium puzzle is usually evidenced by the rejection of the null hypothesis in the uncovered interest parity (UIP) regression. Because this parity need only hold in a risk-neutral world, a risk adjustment term is missing from the equation if speculation in foreign exchange markets is risky. We deal with this issue following the literature which assumes that discounted returns on foreign government bonds are log-normal, so we can linearize the Euler pricing equations (in level) and obtain a modified UIP system for which the risk adjustment term is obtained by applying to the pricing kernel-based relations a generalized autoregressive conditional heteroscedasticity-in-mean model. However, here we innovate by adopting a methodology which differs from all these related works. We construct and use a stochastic discount factor that does not depend on a specific model, by residing in the space of returns which we extract from the data by simply imposing the orthogonality restrictions represented by the Euler equations. So, we devise a purely statistical pricing kernel that performs well in in-sample level equations. Somewhat disappointingly, the risk premium inclusion in the conventional regression changes neither the significance nor the magnitude of the forecasting power of the forward premium for most currencies we study. The contrasting performance of the tests in level and in logs suggests that linearization may be to blame.