BACKGROUND Hospital purchasing alliances are voluntary consortia of hospitals that aggregate their contractual purchases of supplies from manufacturers. Purchasing groups thus represent pooling alliances rather than trading alliances (e.g., joint ventures). Pooling alliances have been discussed in the health care management literature for years but have never received much empirical investigati...

BACKGROUND Nepal was struck by devastating earthquakes in April-May 2015, followed by the India-Nepal border blockade later that year. METHODS We used the United Nations Commodity Trade Statistics (UN Comtrade) database to analyse exports of various health commodities from India to Nepal from January 2011-September 2016. We used time-series regressions of trading volume vs. unit price to ask ...

The last decade has witnessed a dramatic increase in both the number and the market share of screen-based trading systems. Electronic trading systems do offer lower operating costs and the possibility of remote access to the market. On the other hand, arguments based on the anonymity of electronic trading systems suggest that adverse selection may be a more severe problem and that, therefore, b...

Abstract The gas storage regulations are intended to increase security of supply in winter. Tenders and direct procurement by the Market Area Coordinator should ensure that facilities filled. Both instruments can lead a displacement other volumes. Since potentially leads less allows for better control strategic behavior, it may be more effective. Tender design improved setting reserve price all...

In this paper, we investigate how to improve the time series momentum strategy by using partial moments. We find that reversals of can be partly predicted tail-distributed upper and lower moments derived from daily returns commodity futures. Based on such information, propose rule-based approaches trading signals suggested strategy. The empirical results based Chinese futures document statistic...

This paper derives in closed form the optimal dynamic portfolio policy when trading is costly and security returns are predictable by signals with different mean-reversion speeds. The optimal updated portfolio is a linear combination of the existing portfolio, the optimal portfolio absent trading costs, and the optimal portfolio based on future expected returns and transaction costs. Predictors...

In this article, we use a recently introduced asymmetry measure, IE, to measure the idiosyncratic of commodity futures returns and find that negatively significantly predicts cross sectionally. Furthermore, long–short trading strategy based on generates significant abnormal returns, which cannot be explained by traditional risk factors in persists up 12 months. Moreover, appears priced factor w...