In this study, we discuss and develop a distributionally robust joint chance-constrained optimization model and apply it for the shortest path problem under resource uncertainty. In sch a case, robust chance constraints are approximated by constraints that can be reformulated using convex programming. Since the issue we are discussing here is of the multi-resource type, the resource related to cost is deterministic; however, we consider a robust set for other resources where covariance and mean are known. Thus, the chance-constrained problem can be expressed in terms of a cone constraint. In addition, since our problem is joint chance-constrained optimization, we can use Bonferroni approximation to divide the problem into L separate problems in order to build convex approximations of distributionally robust joint chance constraints. Finally, numerical results are presented to illustrate the rigidity of the bounds and the value of the distributionally robust approach.
In Thinking Against Empire: Anticolonial Thought as Social Theory, Julian Go continues his vital work on rethinking and redirecting the discipline of sociology. Go’s piece relates to his wider oeuvre of postcolonial sociology – found in works such as his Postcolonial Thought and Social Theory (2016) as well as multiple journal articles on epistemic exclusion (Go 2020), Southern theory (Go 2016), metrocentrism (Go 2014), and the history of sociology (Go 2009). In this response article, my aim is to think alongside some of the central themes outlined in Go’s paper rather than offering a rebuttal of any sorts. In particular, I want to think through how the recent work on ‘decoloniality’ may play more of a central role in Go’s vision of sociology and social theory than he acknowledges. In doing so, I hope to engage in Go’s prodigious scholarship through centering discussions of the geopolitics of knowledge, double translation, and border thinking. Before proceeding to this discussion, I will offer a brief review of my reading of Go’s paper. 相似文献
This paper provides new evidence on the determinants of vacation leave and its relationship to hours worked and hourly wages by examining the case of Canada. Previous studies from the USA, using individual‐level data, have revealed that annual work hours fall by around 53 hours for each additional week of vacation used. Exploiting a linked employer–employee dataset that allows to control for detailed observed demographic, job, and firm characteristics, we find instead that annual hours of work fall by only 29 hours for each additional week of vacation used. Our findings support the hypothesis that pressure at work may lead employees to use more vacation days but also causes them to work for longer hours. 相似文献
This paper studies the determinants of emigration from six Middle East and North Africa (MENA) countries in light of the Arab Spring of 2011. The aim is to determine if the economically unfortunate events which occurred as a result of the Arab Spring, resulted in a brain drain for many countries. The paper's analysis is conducted using the Arab Transformation Project dataset of the year 2014 by employing an ordered probit model. The paper's main conclusion is that sentiments of unhappiness appear to be the primary determinant of the willingness to emigrate. Other post-revolutionary feelings include lack of trust and political and democratic discontent, which highly encourage the willingness to emigrate. In addition, socio-economic factors, such as being young, male, and highly educated, contribute to the willingness to emigrate. However, married individuals are less likely to consider emigration. 相似文献
This article assesses the potential impact for the State of Palestine (West Bank and Gaza) of enforcing the enactment of the currently suspended Social Security Law (No. 19 of 2016). Using a computable general equilibrium model, we simulate different scenarios associated with the enactment of the social security system on key macroeconomic variables, such as GDP, private consumption, government spending, investment and employment, for the period 2020–2030. We evaluate the influence on the economy of introducing a social security system for private-sector workers, as set out in the 2016 law, and compare the simulation results of each scenario to the baseline. In each scenario, we consider different options concerning severance payment duration and different options for the investment strategy of social security contributions. However, for employees in Gaza, the article does not consider severance payments due to economic difficulties and the Israeli closure policy. 相似文献
Quantitative surveys among refugees not only advance our scientific understanding of forced migration, but they also provide political and civil society actors with the information they need to take measures to improve their protection and living conditions. These actors often need to acquire such information within a short period of time. However, the methods to access and survey this group to gain valid findings are subject to scientific debates. Based on a survey among Syrian refugees in Turkey, this article demonstrates a study design that generated valid knowledge about this population within a limited amount of time and resources. As a unique feature of the article, we compare our sample with four other sources of information to scrutinize how well it resembles the target population. As we can show, although point estimations differ to some extent, the internal distributions of sample characteristics are comparable across sources confirming the success of our sampling method. 相似文献