Modeling economic and agro-environmental dynamics of potato production systems

Crop rotation and other input management practices are of particular interest for their potential impacts on economic and agro-environmental components of potato production. Although crop yield and experimental impacts of rotations of grains, oilseed and legume crops have been published for several experimental studies in Canada there are few models related to the economic and environmental dynamics of potato production. We describe a dynamic model which integrates environmental and economic processes in potato production. The potato rotation model consists of interconnected modules of irrigation and precipitation, soil characteristics, soil erosion, soil water, phosphorus, nitrogen, soil organic matter, farming operations, crop yield and the related calculation of economic return. While not all aspects of crop production have been interlinked, including nitrogen carry-over, this model is the first step in the analysis of experimental data for irrigated potato rotations conducted in southern Manitoba.      

Competition among the big and the small

Many industries are made up of a few big firms, which are able to manipulate the market outcome, and of a host of small businesses, each of which has a negligible impact on the market. We provide a general equilibrium framework that encapsulates both market structures. Due to the higher toughness of competition, the entry of big firms leads them to sell more through a market expansion effect generated by the shrinking of the monopolistically competitive fringe. Furthermore, social welfare increases with the number of big firms because the procompetitive effect associated with entry dominates the resulting decrease in product diversity.     

The sustainable growth rate: the elephant in the room of deficit reduction

The sustainable growth rate (SGR) is a formulaic approach intended to restrain the growth of Medicare spending on physician services. Permanently replacing the SGR will cost $300 billion to $400 billion. Ten years of congressional overrides have contributed to higher Medicare spending on physician services. The absence of a replacement for the SGR leaves the federal government with a significant budget deficit exposure.     

P2P Loans and bank loans,the chicken and the egg,what causes what?: further evidence from a bootstrap panel granger causality test

This study attempts to re-investigate the causal link between bank loans and Peer-to-Peer (P2P) loans from China using data sets from eight areas (i.e., Beijing, Shanghai, Jiangsu, Zhejiang, Shandong, Hubei, Guangdong and Sichuan) over 2014M1-2016M4. We apply a bootstrap panel causality analysis that considers both cross-dependency and heterogeneity across cities. The empirical results indicate a unidirectional Granger causality running from P2P loans to bank loans for Beijing, Shanghai, Zhejiang and Shandong; feedback between P2P loans and bank loads for Jiangsu only and independence for the other three areas (i.e. Hubei, Guangdong and Sichuan).     

Wage/tenure contracts with heterogeneous firms

This paper investigates equilibria where firms post wage/tenure contracts and risk averse workers search for new job opportunities whether employed or unemployed. We generalize previous work by assuming firms have different productivities. Equilibrium implies more productive firms always offer more desirable contracts. Thus workers never quit from more productive firms for less productive firms. Nevertheless turnover is inefficient as employees with long tenures at low productivity firms may reject outside job offers from more productive firms. A worker who quits to a more productive firm may accept a wage cut. Such wage cuts are compensated by faster “promotion” rates to higher wage levels in the future. We also generalize previous arguments by showing equilibria exist where the distribution of offers contains interior mass points and find equilibrium wage/tenure contracts need not be smooth.     

Management Research and the New Logics of Discovery and Engagement

This paper develops an argument that leads to a vision of management research as a form of design science. Such an approach to research requires an inversion of the relationship between rigour and relevance. Giving primacy to the pursuit of rigour, as tends to be the current norm, de-emphasizes the importance of relevance and leads to research that interests very few beyond the community of management scholars. We argue that we should re-imagine relevance as a necessary condition for rigour and that this will lead to new forms of engagement with theory and practice that have the potential to create a new science of management.     

The Year in Review: Economics at the Antitrust Division, 2008–2009

This paper covers the activities of the Economic Analysis Group (EAG) of the Antitrust Division, U.S. Department of Justice, during 2008–2009. It describes the economic analysis undertaken by EAG in several important investigations, and in other activities as an advocate for competition.     

Effect of Cross-Border E-Business Policy on the Export Trade of an Emerging Market: A Dynamic Study of Institutional Support to Cross-Border E-Business at Chinese Pilot Cities

Policies to offer institutional support to cross-border E-business are processed in the development of export at emerging markets. This research estimates the effect of institutional support to cross-border E-business on export trade in an emerging market by a difference-in-difference model. It is found that the institutional support to cross-border E-business at the pilot cities had a positive effect on export trade. Further, a decision tree of predictions to export is developed, based on the cross-border E-business policy and regional economic factors shown to have effect on export, and the complex network of interconnections across the cities in different conditions is revealed. The estimation of probability for export increase based on the effect of cross-border E-business policy is further performed by Bayesian model. This research can be helpful to policy makers and business administrators in understanding the effect of cross-border E-business policies on export at emerging markets.     

Downside Risk Management of a Defined Benefit Plan Considering Longevity Basis Risk

To control downside risk of a defined benefit pension plan arising from unexpected mortality improvements and severe market turbulence, this article proposes an optimization model by imposing two conditional value at risk constraints to control tail risks of pension funding status and total pension costs. With this setup, we further examine two longevity risk hedging strategies subject to basis risk. While the existing literature suggests that the excess-risk hedging strategy is more attractive than the ground-up hedging strategy as the latter is more capital intensive and expensive, our numerical examples show that the excess-risk hedging strategy is much more vulnerable to longevity basis risk, which limits its applications for pension longevity risk management. Hence, our findings provide important insight on the effect of basis risk on longevity hedging strategies.