Narrow Replication of Yogo (2004) Estimating the Elasticity of Intertemporal Substitution when Instruments are Weak

This narrow replication exercise of Yogo (Review of Economics and Statistics 2004; 86 (3): 797–810) finds results identical to the original paper, and provides results on overidentification tests for specifications that do not suffer from the weak instruments problem. The null hypothesis of the Sargan test is rejected in several cases, in particular for US and UK quarterly data. When other combinations of instruments are used the null of the Sargan test is rejected again in several cases. These rejections cast doubts on either instrument validity or model specification. Copyright © 2011 John Wiley & Sons, Ltd.     

Sweetpotato—Biotechnology in different guises on a broad range of scales

Orange-fleshed sweetpotatoes offer the promise of addressing a serious nutritional deficiency in African diets: chronic Vitamin A deficiency, which can cause blindness in children and many complications in adults. Although the official public health policy in Mozambique emphasizes meeting this deficiency through Vitamin A capsules, a group of scientists, mostly women, is championing the cultivation of orange-fleshed sweetpotatoes as an alternative. Not only do the potatoes address the vitamin deficiency; they provide culturally appropriate starchy nutrition and an opportunity to market any surplus the household produces. Creative applications for the powdered sweetpotato, such as in flour for bread, have been developed. Plant tissue culture can support this movement by providing disease-free planting material, making high-yielding, disease-free cultivars more broadly available. Currently, NGOs are purchasing the plantlets on behalf of poor farmers, but eventually, plant tissue culture could become a complementary business in a growing agriculture-based economy, providing rural livelihoods in one of the world's poorest countries. The distributional consequences of the technology of plant tissue culture thus depend on its place in a network of farmer empowerment and rural development as well as on its technical characteristics.     

Fiscal Decentralization and Economic Integration in Mercosur: Argentina and Brazil

ABSTRACT

This article examines the relationship between economic integration and fiscal decentralization for Argentina and Brazil. Economic openness adds costs and benefits to fiscal decentralization, beyond those analyzed in closed economies. The relationships among variables with panel data for the period 1988–2005 are estimated. The innovation of the article lies in considering decentralization at the level of states/provinces. In Brazil, the effect of openness on decentralization is negative and significant, both for expenditures and revenues; in Argentina, the effect is negative or not significant. This difference between countries is based on the different structure of subnational government financing.     

Simple living and tourism in times of ‘austerity’

The sharp increase in domestic tourism in the UK in 2009 and 2010 has prompted speculations about an embryonic quest for ‘simpler pleasures’ and greener, less exotic holidays. Absent from these debates is a more thorough reflection about the complex ways through which people negotiate everyday senses of normalcy, simplicity and excess in consumption and travelling. This is important to understand the political, economic, cultural and technological contexts that may facilitate a shift towards simpler, sustainable lifestyles. The paper presents results of fieldwork looking at ways in which tourists negotiate what is normal and excessive in holidaymaking. Data suggest that tourism is a highly valued symbolic aspect of modern life which few people are ready to sacrifice on environmental grounds and which is inextricably entangled with contested notions of accessibility, citizenship, equality and fairness.     

High‐involvement work practices and environmental capabilities: How HIWPS create environmentally based sustainable competitive advantages

We study how high‐involvement work practices (HIWPs) may enhance a firm's economic performance through the development of a proactive environmental strategy (PES). HIWP systems facilitate the implementation of a PES by promoting employees' ability, motivation, and opportunities to behave in ways consistent with environmental management goals. In turn, PESs contribute to the development of strategic competitive advantages and drive superior performance. The results of our empirical analysis of 233 firms broadly confirm our hypotheses and suggest that although the direct effect of HIWPs on performance was not signifi cant in our sample, HIWPs do have a significant indirect effect through a PES as a mediator.     

Are there arbitrage gaps in the UK gilt strips market?

Evidence in financial markets of an opportunity for pure arbitrage, and therefore a violation of the law of one price, is considered an anomaly to be noted. This paper reports an apparent violation of the law of one price between UK government gilts and their separately traded principal and coupon strips over a sample period of nearly 14 years. There are persistent price differences, and hence opportunities for arbitrage, after allowance for the bid-ask spread; the strips package tends to be overpriced in relation to the corresponding gilt. The price differences may, in part, be due to a lack of liquidity and stale prices in the strips market.     

The price of risk and ambiguity in an intertemporal general equilibrium model of asset prices

We consider a version of the intertemporal general equilibrium model of Cox et?al. (Econometrica 53:363–384, 1985) with a single production process and two correlated state variables. It is assumed that only one of them, Y ₂, has shocks correlated with those of the economy’s output rate and, simultaneously, that the representative agent is ambiguous about its stochastic process. This implies that changes in Y ₂ should be hedged and its uncertainty priced, with this price containing risk and ambiguity components. Ambiguity impacts asset pricing through two channels: the price of uncertainty associated with the ambiguous state variable, Y ₂, and the interest rate. With ambiguity, the equilibrium price of uncertainty associated with Y ₂ and the equilibrium interest rate can increase or decrease, depending on: (i) the correlations between the shocks in Y ₂ and those in the output rate and in the other state variable; (ii) the diffusion functions of the stochastic processes for Y ₂ and for the output rate; and (iii) the gradient of the value function with respect to Y ₂. As applications of our generic setting, we deduct the model of Longstaff and Schwartz (J Financ 47:1259–1282, 1992) for interest-rate-sensitive contingent claim pricing and the variance-risk price specification in the option pricing model of Heston (Rev Financ Stud 6:327–343, 1993). Additionally, it is obtained a variance-uncertainty price specification that can be used to obtain a closed-form solution for option pricing with ambiguity about stochastic variance.     

The Causal Effect of Corporate Governance on Corporate Social Responsibility

In this article, we examine the empirical association between corporate governance (CG) and corporate social responsibility (CSR) engagement by investigating their causal effects. Employing a large and extensive US sample, we first find that while the lag of CSR does not affect CG variables, the lag of CG variables positively affects firms’ CSR engagement, after controlling for various firm characteristics. In addition, to examine the relative importance of stakeholder theory and agency theory regarding the associations among CSR, CG, and corporate financial performance (CFP), we also examine the relation between CSR and CFP. After correcting for endogeneity bias, our results show that CSR engagement positively influences CFP, supporting the conflict-resolution hypothesis based on stakeholder theory, but not the CSR overinvestment argument based on agency theory. Furthermore, firms’ CSR engagement with the community, environment, diversity, and employees plays a significantly positive role in enhancing CFP.     

Outward FDI and Productivity: Micro‐evidence from Slovenia

This paper uses a rich data set of Slovenian manufacturing firms active in the period 1994–2002 that contains information on outward FDI and exports to different markets in order to test three empirical hypotheses that relate the decision for outward FDI to total factor productivity. First, the evidence supports the hypothesis proposed by Helpman, Melitz and Yeaple (2004) that more productive firms are more likely to invest in a foreign affiliate. Second, the hypothesis proposed by Head and Ries (2003 ) that less productive firms may be encouraged to invest in low‐income countries is rejected by the data. However, the main contribution of the paper is to confirm the third hypothesis that required firm's productivity increases with the number of markets that the firm serves, i.e. there is a positive relationship between the number of a firm's foreign affiliates and its total factor productivity.