This elegant volume by EdwardA Martin, a wellknown Dublin neurologist, lists some 170 bookplates ofIrish doctors. Although the majority are of Dublin physicians, some 50 are from Northern Ireland, such as Dr Thomas Andrews and Dr Alexander Jaffray Nicholson (father of the Brigadier), of the nineteenth century, and Dr Hugh Calwell and Sir Ian Fraser of more recent times. Most bookplates are armo...

First version: April 2005 Second version: April 2006 ________________________________________________________________________ Abstract This paper models the firm as a community à la Akerlof (1980) to account for asymmetric behavior, and in particular, downward rigidity of wages. It is shown that, through social interaction among workers in the firm community, wage cuts can give rise to a large,...

هدف: کارآفرینی یکی از عوامل کلیدی در توسعه اقتصادی و شاخص اساسی جوامع روبه‌رشد است. آنچه که کارآفرین را به آغاز فعالیت ترغیب می‌کند، انگیزه فرایند تبدیل یک فرد عادی است می‌تواند فرصت‌هایی ایجاد کند حداکثر رساندن ثروت کمک کند. هدف این پژوهش شناسایی طبقه‌بندی انگیزه‌های کارآفرینان می­باشد.طراحی/ روش‌شناسی/ رویکرد: با رویکرد مرور نظام­مند استفاده ماتریس شش سلولی دو مؤلفه جهت (کشش یا فشار) منبع (اق...

We propose a new model of a local public goods economy with differentiated crowding. The new feature is that taste and crowding characteristics of agents are distinguished from one another. We prove that if the economy satisfies strict small group effectiveness then the core is equivalent to the set of Tiebout equilibrium outcomes. Equilibrium prices are defined to depend solely on crowding cha...

This paper presents a principal-agent model in which the agent has imprecise beliefs. We model this situation formally by assuming the agent’s preferences are incomplete as in Bewley (1986) [2]. In this setting, incentives must be robust to Knightian uncertainty. We study the implications of robustness for the form of the resulting optimal contracts. We give conditions under which there is a un...

We consider a simple mechanism design problem with private values in which each agent perceives Knightian uncertainty over his opponents’ types. Uncertainty is formalized using incomplete preferences as in Bewley (1986). We show that the seller can extract all gains from trade with a direct mechanism in which truth-telling is a Nash equilibrium, in the sense that no buyer has a unilateral incen...

We provide sufficient conditions for the feasibility of a Pareto-improving fiscal policy when risk-free interest rate on government bonds is below growth rate. do so in class incomplete markets models pioneered by Bewley-Huggett-Aiyagari, but we allow an arbitrary amount ex ante heterogeneity terms preferences and income risk. consider both case dynamic inefficiency as well more plausible effic...

We examine incomplete preference structures in a framework that allows for various relaxations of the independence axiom. We derive preference representations in terms of willingness-to-pay measures, and demonstrate how these representation can be used to determine preference incompleteness and to elicit preferences empirically. Decision makers faced with an array of choices that are poorly und...

اندازه‌گیری پرتو گاما در زمینه‌های مختلف تحقیقاتی نیازمند آشکارسازهای کارآمد است. زمینه دزیمتری فوتون آشکارساز جرقه‌ای NaI(Tl) به عنوان یکی از سوسوزن معدنی (غیرآلی)، علت دارا بودن مقدار بالای نور خروجی بسیار حایز اهمیت این پژوهش سعی گردیده است، با کمک کد مونت‌کارلو (MCNPX) مقدمات مشخصه‌یابی توسط و بهره‌گیری روش‌های متفاوت محاسبه دز (تالی‌های 6F، 4*F، 6+F 8*F) انجام شود. طور معمول، یک تابش (شمار...