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1.
We study a labor market described by a many-to-one matching market with externalities among firms in which each firm’s preferences depend not only on workers whom it hires, but also on workers whom its rival firms hire. We define a new stability concept called weak stability and investigate its existence problem. We show that when the preferences of firms satisfy an extension of substitutability and two new conditions called increasing choice and no external effect by an unchosen worker, then a weakly stable matching exists. We also show that a weakly stable matching may fail to exist without these restrictions. 相似文献
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In the many-to-one matching model with contracts, I show that there is no restriction on preferences weaker than substitutable preferences which guarantees that the set of stable allocations is a lattice. Thus, when contracts are not substitutes, removing agents from the economy may decrease the payoffs to existing agents on both sides of the market. 相似文献
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In matching problems with externalities, prudence measures the importance an agent gives to others’ potential reactions when she considers deviating and social connectedness measures others’ capacity to react to the agent’s deviation. Assuming that externalities and preferences are random, the roles of prudence and social connectedness are studied. It is shown that asymptotic stability – a property that never holds in the absence of externalities – is achieved when the product of social connectedness and prudence grows at least exponentially with the population. Since social connectedness increases quickly in both the marriage and roommates markets, stability obtains even when prudence vanishes (sufficiently slowly). 相似文献
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This paper examines the effect of externalities on the consequences of financial market globalization in a two-country growth model augmented with domestic credit market imperfections. Following the endogenous growth literature, externalities are byproducts of capital production. Unlike previous studies, I find that their formation matters. Specifically, when transnational externalities consist solely of a rich country’s capital stock, financial market globalization brings about world-wide gains in growth. However, when these externalities are a product of both the rich and the poor countries’ capital stock, this globalization process only fosters growth in the rich country. Furthermore, if such externalities are sufficiently weak, both the rich and the poor countries may become locked in a stage with no meaningful growth. 相似文献
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确定数列的通项公式,对于研究数列的性质起着至关重要的作用。不动点求通项就是其中之一,运用不动点求数列通项既是竞赛数学的内容之一,也是近年来高考命题的热点。文章着重介绍两种运用不动点求数列通项的方法。 相似文献
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本文运用一致凸的Banach空间理论,讨论了Lp空间有界区域的极小半径问题和正交变换群作用的不动点问题,获得L(pΩ)空间的非空有界集一定存在唯一点x0∈Lp(Ω),使得f(x0)=x∈Lp(Ω)inf f(x),利用此结论还得到正交变换群作用在L(pB)空间上存在不动点。 相似文献
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文章利用Schauder不动点定理,研究了一类时滞微分方程的非负周期解的存在性熏得到了一些新的结果并改进了相应的结论。 相似文献
9.
We investigate dynamical properties of a heterogeneous agent model with random dividends and further study the relationship between dynamical properties of the random model and those of the corresponding deterministic skeleton, which is obtained by setting the random dividends as their constant mean value. Based on our recent mathematical results, we prove the existence and stability of random fixed points as the perturbation intensity of random dividends is sufficiently small. Furthermore, we prove that the random fixed points converge almost surely to the corresponding fixed points of the deterministic skeleton as the perturbation intensity tends to zero. Moreover, simulations suggest similar behaviors in the case of more complicated attractors. Therefore, the corresponding deterministic skeleton is a good approximation of the random model with sufficiently small random perturbations of dividends. Given that dividends in real markets are generally very low, it is reasonable and significant to some extent to study the effects of heterogeneous agents’ behaviors on price fluctuations by the corresponding deterministic skeleton of the random model. 相似文献
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Philip Sander;Julia Zabel; 《International Journal of Nonprofit & Voluntary Sector Marketing》2024,29(2):e1845
Online donation platforms have grown increasingly established in the past two decades. Among substantial research into donation-based crowdfunding platforms in general, no studies address the intention to use matching donation platforms. The latter refers to a hypothetical product, not currently available on the market. It represents an extension of conventional donation platforms, aligning donors' preferences with NPOs and projects present on the platform. Drawing on the technology acceptance model (TAM), this exploratory study empirically investigates factors that influence the intention to use a matching donation platform. It also extends the TAM to include trust and donation processing factors and considers the perspectives of both donors and nonprofit organizations (NPOs) engaged in fundraising. The data include an online survey of 458 donors and 112 NPOs in Germany. The findings indicate that all factors, including trust and donation processing, within the extended TAM exert a significant impact on the intention to use a matching donation platform, and attitude toward the platform represents the most influential factor. This article also provides entrepreneurial recommendations for how a matching donation platform can be implemented and used in practice. For example, a matching donation platform should aim at younger donor target groups and provide NPOs with suitable options for processing donations. 相似文献
12.
运用入侵检测系统的融合模式匹配算法取得待匹配的字符串集合的公共前缀与文本匹配,若为单模式匹配则匹配结束,若为多模式匹配则将文本被分割成的字符串集中的字符串分别与模式串匹配,该融合算法对单模式匹配和多模式匹配均提高了效率,识别了正文的大小写。 相似文献
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付廷达 《中小企业管理与科技》2020,(5):158-159
通过运用BIM技术对预应力混凝土连续梁悬灌施工进行优化,解决了跨吉信互通特大桥钢筋优化、混凝土多孔定点振捣、预应力管道定位、钢筋定位和泵送混凝土浇筑等施工难题,取得了明显的经济效果,可为类似工程的修建提供借鉴。 相似文献
15.
This paper proposes a unified theoretical framework where formal and informal firms coexist and face the same type of product and labor market imperfections: they have monopoly power in the goods market, they are subject to matching frictions in the labor market, and wages are determined by bargaining between large firms and their workers, through either individual or collective bargaining. Our model matches the main stylized facts on informality for developing countries and appears to be a good candidate for policy analysis. In this framework, we study the impact on informality, wages and unemployment of policies that may be used to reduce informality. We consider changes in product market regulation (PMR) and in two types of fiscal policies, labor taxes and formality enforcement. We find that lessening PMR decreases informality and unemployment simultaneously, indicating that there is not necessarily a tradeoff between informality and unemployment. The tradeoff appears when fiscal policies are used, though. Moreover, the impacts of PMR on unemployment and on wages are larger under collective than individual bargaining. With respect to wage inequality, lessening PMR reduces it, while lower taxes tend to increase the formal sector wage premium. 相似文献
16.
目前,房地产市场正处于观望期、调整期,市场下行压力加大。如何认识和看待房地产市场的波动,如何建立稳控房地产市场的长效机制和制度,是摆在房地产工作者面前需要迫切解决的重大课题。在分析了房地产市场波动趋势的前提下,提出稳控房地产市场的税改选择和改革我国房地产税制的若干构想。 相似文献
17.
利用锥理论和非对称迭代方法,讨论了一类非单调二元算子方程解的存在唯一性,给出了迭代序列收敛于解的误差估计,所得结果是某些已知结果的改进和推广。 相似文献
18.
F. Di Pace 《Journal of Economic Dynamics and Control》2012,36(2):183-200
We extend the standard textbook search and matching model by introducing deep habits in consumption. This assumption generates amplification in the response of labour market variables to technology shocks by producing endogenous countercyclical mark-ups. The cyclical fluctuations of vacancies and unemployment in our model can replicate those observed in the US data, with labour market tightness being 20 times more volatile than consumption. Vacancies display a hump-shaped response to technology shocks and the numerical simulations generate an artificial Beveridge curve that is in line with the data. Our model preserves the assumption of fully flexible wages for new hires and the calibration is consistent with the estimated elasticity of unemployment to unemployment benefits. Finally, we show that in contrast to models with exogenous mark-up shocks, the deep habits model does not require an implausible variation in the elasticity of demand to match the volatility of labour market variables, and the cyclical properties of the mark-up are in line with empirical evidence. 相似文献
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众所周知,我国的房地产市场发展很不均衡。区域分割明显,究其原因,主要是房地产市场调节失灵,信息不对称。本文以房地产市场评价理论为研究基础,就如何解决房地产市场失灵和信息不对称问题,建立和谐稳定的市场秩序,提出了自己的观点。 相似文献