We explore the relation between the establishment of a regulatory agency and the performance of the electricity sector. We exploit a dataset comprising firmlevel information on a representative sample of 220 electric utilities from 51 development countries for the period 1985 to 2005. Our results indicate that regulatory agencies are associated with more efficient firms and with higher social w...

We analyze an equilibrium search model in a duopoly setting with bilateral heterogeneities in production and search costs in which firms can advertise by announcing price and location. We study existence, stability, and comparative statics in such a setting, compare the duopolistic advertising level to the socially optimal level, and find conditions in which a duopolist advertises more or less ...

هدف: هدف پژوهش حاضر بررسی ویژگی‌های روان سنجی مقیاس استرس آسیب‌زا کوید-19 بود که اثرات ویروس کرونا را بر جنبه‌های مختلف زندگی مردم ایران مورد قرار می‌دهد. روش:پژوهش توصیفی از نوع همبستگی بود. جامعۀ آماری شامل کلیۀ افرد بزرگسال شهر تهران در دامنۀ سنی 17 تا 72 سال 461 نفر طریق فراخوانی اینترنتی تحقیق شرکت کردند. برای تجزیه‌وتحلیل داده‌ها دو روی‌آورد کلاسیک و نظریۀ سؤال- پاسخ نرم­افزارهای Spss نسخ...

American industries have grown more concentrated over the last 40 years. In absence of productivity innovation, this should lead to price hikes and output reductions, decreasing consumer welfare. With US census data from 1972 2012, I use disentangle revenue output. Industry-level estimates show that concentration increases are positively correlated real growth, uncorrelated with changes overall...

The article analyzes theoretical foundations of enterprises logistics system construction, gives the classification main entrepreneurial activity subjects in Ukraine, traces key development trends and outlines a role small business national economic system, conducts comparative analysis medium entrepreneurship specific weight defines economical aspects managing their system. research conducted ...

The concept of linear risk tolerance is transferred from the expected utility framework to the two-parameter, mean-variance approach. We show how the requirement of a hyperbolical Arrow-Pratt index translates from the EU-approach into a condition on the marginal rate of substitution between return and risk in the two-parameter approach. As a spin-off from this translation, we derive a specific ...

We analyse the effect of the anonymisation method multiplicative stochastic noise on the within estimation of a linear panel model. In particular, we concentrate on the panel model with serially correlated regressors. In addition to anonymisation as such, the serial correlation in a data set with only few points in time increases the bias of the within estimator and therefore must be taken into...