Existence of a Universal Comparative Statics Matrix for Differentiable Optimization Problems

A universal existence theorem is established that yields exhaustive and constraint-free comparative statics information for a general, differentiable optimization problem in the preferred form of a semidefinite matrix. It subsumes all comparative statics formulations of differentiable optimization problems. Its relationship to comparative statics methods extant is establishedWe are grateful to an anonymous referee for a particularly helpful comment on the contents of this paper.     

Jump Spillover in International Equity Markets

In this article we study jump spillover effects between a numberof country equity indexes. In order to identify the latent historicaljumps of each index, we use a Bayesian approach to estimatea jump-diffusion model on each index. We look at the simultaneousjump intensities of pairs of countries and the probabilitiesthat jumps in large countries cause jumps or unusually largereturns in other countries. In all cases, we find significantevidence of jump spillover. In addition, we find that jump spilloverseems to be particularly large between countries that belongto the same regions and have similar industry structures, whereas,interestingly, the sample correlations between the countrieshave difficulties in capturing the jump spillover effects.     

Erratum on “Optimal inventory control of empty containers in inland transportation system” [Int. J. Prod. Econ. 133(1) (2011) 451–457]

This paper points out some flaws in the simulation model presented by Yun et al. [2011. Optimal inventory control of empty containers in inland transportation system. International Journal of Production Economics 133 (1), 451–457]. Some of the formulae for inventory level and ordering quantity have errors which are corrected in this note.     

Persistence,seasonality and trend in the UK egg production

This paper discusses the time-series properties of UK egg production in order to provide an empirical analysis of the possible long-run impact of the shock on the industry following the recent incidence of salmonella poisoning. Our analysis shows that although the short-run properties of the UK egg production are consistent with the presence of persistent shocks, a shock duration is unlikely to have large long run efefcts. This result is remarkably robust to the choice of the persistence measure obtained.     

Sustainability,Optimality, and Development Policy

Considering sustainability a matter of intergenerational welfare equity, this paper examines whether an optimal development path can also be sustainable. It argues that the general “zero‐net‐aggregate‐investment” condition for an optimal development path to be sustainable in the sense of the maximin criterion of intergenerational justice is too demanding to be practical, especially in the context of developing countries. It further argues that while the maximin criterion of sustainability may be appealing to the rich advanced industrial countries, for the poor developing countries it implies equalization of poverty across generations, and as such is too costly a moral obligation to be acceptable. The paper suggests that a compromise development policy that follows the optimal growth approach but adopts certain measures to mitigate both the intergenerational and intragenerational welfare inequalities may be more appropriate for these countries. Some of the principal elements of such a policy are highlighted.     

An analytical approach with a reliable logic and a ranking policy for post-mining land-use determination

Because it is the post-mining land-use that prescribes the methods, the measures and the costs of mine reclamation, a major implicit goal of mine reclamation is to determine an after-use option. Therefore, there should be an analytical approach to optimize the determination of post-mining land-use. A Mined Land Suitability Analysis (MLSA) framework, which had been previously derived from reclamation practice reports of mines and other disturbed lands, is used in combination with two Multi-Attribute Decision-Making (MADM) techniques to provide the required analytical approach. In the proposed approach the decision makers consist of the most related experts and the identified stakeholders. The Analytical Hierarchy Process (AHP) method is used to determine global weights of MLSA framework attributes via pair-wise comparison matrixes composed by each individual expert. Once the global weight vector of the attributes is calculated using AHP, they are incorporated into the decision matrices composed by stakeholders and passed to the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS), which is a distance-based MADM technique and is used to determine preference order of post-mining land uses.     

What is a farecard worth?

In this paper wer use the duality approach to demand theory to evaluate the value to a consumer of a farecard which allows travel at zero marginal pecuniary cost. The analysis is extended to networks with two modes of travel (bus and underground).Illustrative figures are calculated for farecards on the London Transport network.     

US Economic Sanctions Against China: Who Gets Hurt?

The United States maintains a broad spectrum of economic sanctions against China ranging from export controls to prohibitions on certain imports. Our study finds that, although from a macroeconomic perspective, US sanctions have had no significant adverse effect on China's overall economic growth and trade between the two countries, they do have a negative impact on producers and consumers in both countries. US economic sanctions have hindered technology transfer to China and US investment in China. US restrictions on imports from China have caused deadweight losses for the US due to higher domestic production costs for import substitutes and a reduction in consumption. US export controls have hindered US exports to China and contributed to large US trade deficits with China. The export controls have also caused losses of high‐paid jobs in the United States and benefited competitors from other countries. In addition, US economic sanctions against China have had significant third‐party effects. China's diversification of imports to sources other than the United States may have a long‐term effect on US exports to China even after US economic sanctions against China are lifted.