Revisiting lepton flavor violation in supersymmetric type II seesaw

In view of the recent measurement of reactor mixing angle $\theta_{13}$ and updated limit on $BR(\mu \to e \gamma)$ by the MEG experiment, we re-examine the charged lepton flavor violations in a framework of supersymmetric type II seesaw mechanism. Supersymmetric type II seesaw predicts strong correlation between $BR(\mu \to e \gamma)$ and $BR(\tau \to \mu \gamma)$ mainly in terms of the neutrino mixing angles. We show that such a correlation can be determined accurately after the measurement of $\theta_{13}$. We compute different factors which can affect this correlation and show that the mSUGRA-like scenarios, in which slepton masses are taken to be universal at the high scale, predicts $3.5 \lesssim BR(\tau \to \mu \gamma)/BR(\mu \to e \gamma) \lesssim 30$ for normal hierarchical neutrino masses. Any experimental indication of deviation from this prediction would rule out the minimal models of supersymmetric type II seesaw. We show that the current MEG limit puts severe constraints on the light sparticle spectrum in mSUGRA model if the seesaw scale lies within $10^{13}$-$10^{15}$ GeV. It is shown that these constraints can be relaxed and relatively light sparticle spectrum can be obtained in a class of models in which the soft mass of triplet scalar is taken to be non-universal at the high scale.Comment: Minor changes in text; accepted for publication in Phys. Rev.

A Note on War and Fiscal Capacity in Developing Countries

We examine the effect of war on state fiscal capacity in developing countries, measured by tax revenue to GDP ratios. In divided or factionalised societies, patronage may substitute for common interest public goods, with the possibility of violent contestation over a rent. Our dynamic panel empirical estimates of the determinants of fiscal capacity are applied to 79 developing countries, during 1980–2010. Results indicate that war, especially civil war, retards fiscal capacity, along with poor governance, oil dependence and macroeconomic mismanagement

(WP 2013-03) War and the Fiscal Capacity of the State

We examine the role of war in retarding state fiscal capacity in developing countries, measured by tax revenue ratios to GDP. This in contrast to the European experience from the Renaissance to the 20th century, where it is believed that war and state-building were inseparable, enhancing the fiscal capacity of the state; in turn enlarging the scope and magnitude of government expenditure. We build a simple theoretical model of a factionalized state, where patronage substitutes for common interest public goods, along with the possibility of violent contestation over a rent or prize, typically in the form of natural resource revenues. Our dynamic panel empirical analysis on the determinants of fiscal capacity is applied to 79 developing countries, during 1980-2010. Results indicate that war, especially in its current dominant form of civil war, retards fiscal capacity, along with imperfect democracy, political repression, the quality of governance, dependence on oil and macroeconomic mismanagement. High intensity conflict is particularly destructive of state capacity. Countries experiencing low intensity wars, other institutional factors may matter more for fiscal capacity formation compared to war. The diminution of state capacity due to war appears less pronounced after the end of the cold war

Synchronization of oscillators with long range power law interactions

We present analytical calculations and numerical simulations for the synchronization of oscillators interacting via a long range power law interaction on a one dimensional lattice. We have identified the critical value of the power law exponent $\alpha_c$ across which a transition from a synchronized to an unsynchronized state takes place for a sufficiently strong but finite coupling strength in the large system limit. We find $\alpha_c=3/2$. Frequency entrainment and phase ordering are discussed as a function of $\alpha \geq 1$. The calculations are performed using an expansion about the aligned phase state (spin-wave approximation) and a coarse graining approach. We also generalize the spin-wave results to the {\it d}-dimensional problem.Comment: Final published versio

Microfinance and Environment: Does the Participation in the Microcredit Based Social Forestry of Proshika in Bangladesh Improve Environmental Literacy?

The study intends to assess the impact of the participation in the microcredit based social forestry program of Proshika in Bangladesh on the environmental literacy of participating households. The analysis is based on a household-level survey of 450 households. Considering the endogeneity in program participation, the instrumental variable (IV) technique has been used to achieve the objective of the paper. The results indicate that the participation in the social forestry program of Proshika significantly enhances the environmental literacy of participating households.Microcredit, Social Forestry, Environmental Literacy, Proshika, Bangladesh,

Does the Participation in the Microcredit Programs Increase Consumption of Participating Households? The Case of the Grameen Bank in Bangladesh

This paper assesses empirically the impact of the participation in the microcredit program of the Grameen Bank on consumption of participating households. A household level survey was carried out for collecting data (N=521). The results of the empirical estimations indicate that the participation of a household in the microcredit program of the Grameen Bank increases consumption of participating households significantly. But there is non-linearity in the increasing trend in consumption of participating households. The consumption level goes up gradually with the increase in the membership duration up to five years of membership, but the growth rate starts declining after that period of membership.Microcredit, Consumption, Impact Assessment, Grameen Bank, Bangladesh, Agricultural Finance, Consumer/Household Economics, Food Consumption/Nutrition/Food Safety, Food Security and Poverty,

Does the Participation in the Microcredit Programs Contribute to the Development of Women Entrepreneurship at the Household Level? Experience from Bangladesh

Microcredit, Women Entrepreneurship Development, Bangladesh, Consumer/Household Economics,