Institutional entrepreneurship and permaculture: A practice theory perspective

Permaculture is a growing but little researched phenomenon emphasising care for the environment, equity, fair treatment of people and working with—and not against—nature. It thus represents a potential alternative to business as usual, capable of addressing fundamental challenges posed by human-made climate change. The paper examines a previously ignored site of entrepreneurship by taking a practice perspective, exploring connections between the practice and growth of permaculture and institutional entrepreneurship. It assesses practice-related and institutional factors affecting the start-up and operation of permaculture enterprises in the United Kingdom. The study maps and surveys UK Permaculture Association members who have started up their own business and reports on qualitative data from personal interviews with twenty of them. Data analysis employs NVivo software and involves thematic analysis pertaining to the practice, institutional biographies and institutional portfolios of permaculture entrepreneurs. The findings show the importance of permaculture activists' institutional biographies and institutional portfolios to the start-up and operation of permaculture enterprises and for shaping permaculture-related practice. The contribution of the paper lies in how it balances attention to individual agency with subfield-specific, organisational field and macrosocial factors in understanding ‘beyond profit’ entrepreneurship.     

The Impact of Foreign Real Estate Investment on Land Prices: Evidence from Mauritius

This paper examines the impact of foreign real estate on land prices in Mauritius. Using a panel dataset comprising price, quantity and other information for a variety of luxury villas and apartments, we show that the price of land paid by locals has been pushed up by a modest 4–22% in total as a result of these developments. We also examine the determinants of the prices of the dwellings in these schemes, finding that they are strongly related to the sizes of the plots, whether they have ocean views, and the desirability of the region in which they are sited, although there remains considerable unexplained heterogeneity.     

Endowment Differences and the Composition of Intra‐Industry Trade

The empirical relationship between differences in endowments and different types of trade is investigated in this paper. Although net trade (NT) and vertical intra‐industry trade (IIT) are both broadly viewed as reflecting endowment differences, we suggest that there will be systematic differences in the way their shares of trade adjust as endowment differences become larger. Empirical evidence for European Union trade with its 52 major trading partners confirms this. The share of horizontal IIT (net trade) decreases (increases) for all increases in absolute endowment differences, but the share of vertical IIT can both increase and decrease with increases in endowment differences.     

Returns and option activity over the option-expiration week for S&P 100 stocks

For S&P 100 stocks, we find that the weekly returns over option-expiration (OE) weeks (a month’s third-Friday week) tend to be high, relative to: (1) the third-Friday weekly returns of other stocks with less option activity, (2) the own stock’s other weekly returns, (3) the risk, based on asset-pricing alphas. For these same stocks, a month’s fourth-Friday weekly returns underperform modestly. We suggest the following two avenues are likely partial contributors towards understanding these return patterns: (1) delta-hedge rebalancing by option market makers, with a reduction in short-stock hedge positions over the OE week, and (2) declining risk perceptions over the OE week, as measured by option-derived implied volatilities. Our findings suggest option activity can induce reliable patterns in the weekly returns of option-active large-cap stocks.     

Non-Laplacian beliefs in a global game with noisy signaling

In standard global games, individual behavior is optimal if it constitutes a best response to agnostic—Laplacian—beliefs about the aggregate behavior of other agents. This paper considers a standard binary action global game augmented with noisy signaling by an informed policy-maker and shows that in this game, equilibrium beliefs depart in quite stark ways from the Laplacian benchmark. In the limit as signals become arbitrarily precise, so that all fundamental uncertainty is removed (leaving only strategic uncertainty), the equilibrium beliefs of the marginal individual concerning the aggregate action collapse to a discrete Bernoulli distribution, giving probability mass only to the polar extreme outcomes. By contrast in the underlying standard global game the marginal individual believes the aggregate action has a continuous uniform distribution, giving equal likelihood to all possible outcomes.     

Right anterior thoracotomy aortic valve replacement is associated with less cost than sternotomy-based approaches: a multi-institution analysis of ‘real world’ data

Background:

Large institutional analyses demonstrating outcomes of right anterior mini-thoracotomy (RAT) for isolated aortic valve replacement (isoAVR) do not exist. In this study, a group of cardiac surgeons who routinely perform minimally invasive isoAVR analyzed a cross-section of US hospital records in order to analyze outcomes of RAT as compared to sternotomy.

Methods:

The Premier database was queried from 2007–2011 for clinical and cost data for patients undergoing isoAVR. This de-identified database contains billing, hospital cost, and coding data from >600 US facilities with information from >25 million inpatient discharges. Expert rules were developed to identify patients with RAT and those with any sternal incision (aStern). Propensity matching created groups adjusted for patient differences. The impact of surgical approach on outcomes and costs was modeled using regression analysis and, where indicated, adjusting for hospital size and geographical differences.

Results:

AVR was performed in 27,051 patients. Analysis identified isoAVR by RAT (n?=?1572) and by aStern (n?=?3962). Propensity matching created two groups of 921 patients. RAT was more likely performed in southern hospitals (63% vs 36%; p?p?p?p?p?Conclusions:

Outcomes analyses can be performed from hospital administrative collective databases. This real world analysis demonstrates comparable outcomes and less cost and ICU time with RAT for AVR.     

Comparing students by a matching analysis – on early school leaving in Dutch cities

In case of regional discretionary on the implementation of policy measures, central governments often consider differences in outcomes as an indication that one policy was more effective than another policy. If uniform incentives are provided to motivate regional policy makers, these incentives can be discouraging when the underlying populations differ. Empirically, this study compares early school leaving between the four largest Dutch cities. It shows that considering regional differences as performance measures can be dangerous if differences in population characteristics are not properly taken into account. Methodologically, this study contrasts the use of a traditional probit model with a more advanced iterative matching procedure.     

英国养老金的发展

英格兰对退休雇员给付养老金已经有很长的历史。1269年国王亨利三世因仆人威廉年纪大、身体弱,授予他每天4便士的养老金。本文先勾画自那时起的养老金历史发展,然后讨论当前养老金的问题,最后预测今后10年英国养老金的发展。     

OPTIMIZATION‐BASED PROCUREMENT FOR TRANSPORTATION SERVICES

This paper presents the concept of optimization‐based procurement for transportation services. The approach allows both the shipper and carriers to benefit through the use of a collaborative approach to securing and managing a strategic relationship. Because the shipper's assignment problem involves a combinatorial number of choices and cannot be easily executed manually, the procurement process benefits strongly from the use of optimization. The authors introduce the optimization‐based procurement process, briefly analyze the theoretical issues, and discuss lessons learned from its application in practice over the last several years.