a minimum wage can be welfare improving and employment enhancing abstract we examine whether minimum wages can fulfill a useful role as part of an optimal tax transfer scheme the government cannot observe household abilities only their incomes and is constrained to ensure that those working are at least as well off as those not working a minimum wage combined with the institutional features of typical welfare systems allows the incentive constraint to be severed at the ability level associated with the minimum wage if such a scheme can be enforced the government can increase the amount of redistribution from those working to those not working and possibly lower the number of unemployed

the economics of forced migration abstract this article reviews the economics literature on the impacts of forced migration the literature is divided into two parts impacts on forced migrants and impacts on host communities studies exploring the impact of forced migration due to wwii suggest that the long term impact is often positive the literature for developing countries suggests that there are serious consequences of forced migration for those forced to migrate these consequences range from worse labour market outcomes to less consumption smoothing the impact on host communities seems to be mixed and there are winners and losers the article provides suggestions for future research

this time is the same using bank performance in 1998 to explain bank performance during the recent financial crisis are some banks prone to perform poorly during crises if yes why in this paper we show that a bank s stock return performance during the 1998 crisis predicts its stock return performance and probability of failure during the recent financial crisis this effect is economically large our findings are consistent with persistence in a bank s risk culture and or aspects of its business model that make its performance sensitive to crises banks that relied more on short term funding had more leverage and grew more are more likely to be banks that performed poorly in both crises

on the sign of the optimum marginal income tax this paper studies a central aspect of optimal income taxation as modelled in mirrlees original paper on the topic identical leisure consumption preferences qualitatively homogeneous skills in production namely whether given concave utilitarianism alone the optimal marginal income tax will be non negative a well known positive answer to this question in weak inequality form was given in the said paper which however we show requires additive separability of individual utility in the ordinal and cardinal senses our main result here is to derive the required strict positivity of the marginal tax under weak conditions slightly wider than noninferiority of consumption and leisure with preferences otherwise arbitrary

a contribution to the theory of optimal utilitarian income taxation abstract the paper provides a new formulation of the mirrlees seade theorem on the positivity of the optimal marginal income tax under weaker assumptions and in a more general model the formulation of the theorem is independent of whether the model involves finitely many types or a continuous type distribution the formal argument makes the underlying logic transparent relating the mathematics to the economics and showing precisely how each assumption enters the analysis

money liquidity and monetary policy in a market based financial system banking and capital market developments are inseparable and funding conditions are closely tied to fluctuations in the leverage of market based financial intermediaries offering a window on liquidity the balance sheet growth of broker dealers provides a sense of the availability of credit contractions of broker dealer balance sheets have tended to precede declines in real economic growth even before the current turmoil for this reason balance sheet quantities of market based financial intermediaries are important macroeconomic state variables for the conduct of monetary policy

a theory of collective reputations with applications to the persistence of corruption and to firm quality the paper is a first attempt at modelling the idea of group reputation as an aggregate of individual reputations a member s current incentives are affected by his past behaviour and because his track record is observed only with noise by the group s past behaviour as well the paper thus studies the joint dynamics of individual and collective reputations and derives the existence of stereotypes from history dependence rather than from a multiplicity of equilibria or from the existence of a common trait as is usually done in the literature it shows that new members of an organization may suffer from an original sin of their elders long after the latter are gone and it derives necessary and sufficient conditions under which group reputations can be rebuilt last the paper applies the theory to analyse when a large firm can maintain a reputation for quality 1 collective reputations collective reputations play an important role in economics and the social sciences countries ethnic racial or religious groups are known to be hard working honest corrupt hospitable or belligerent some firms enjoy substantial rents from their reputations for producing high quality products some departments are reported to treat their faculty or students fairly the paper is a first attempt at modelling the idea of group reputation as an aggregate of individual reputations a member s current incentives are affected by her past behaviour and because her track record is observed only with noise by the group s past behaviour as well the paper studies the joint dynamics of individual and collective reputations in a model in which current generations are progressively replaced by new ones and derives the existence of stereotypes from history dependence rather than from a multiplicity of equilibria or from the existence of a common trait as is usually done in the literature see section 2 for a detailed comparison with the literature it shows that new members of an organization may suffer from an original sin of their elders long after the latter are gone and it derives necessary and sufficient conditions under which group reputations can be rebuilt last the paper applies the theory to analyse when a large firm can maintain a reputation for quality let us spell out the building blocks of our theory in more detail a a group s reputation is only as good as that of its members each member is characterized by individual traits such as talent diligence or honesty past individual behaviour conveys information about these traits and generates individual reputations

neglected risks financial innovation and financial fragility abstract we present a standard model of financial innovation in which intermediaries engineer securities with cash flows that investors seek but modify two assumptions first investors and possibly intermediaries neglect certain unlikely risks second investors demand securities with safe cash flows financial intermediaries cater to these preferences and beliefs by engineering securities perceived to be safe but exposed to neglected risks because the risks are neglected security issuance is excessive as investors eventually recognize these risks they fly back to the safety of traditional securities and markets become fragile even without leverage precisely because the volume of new claims is excessive

bank regulation risk and return evidence from the credit and sovereign debt crises in this paper we analyze whether regulation reduced risk during the credit crisis and the sovereign debt crisis for a cross section of global banks in this regard we examine distance to default laeven and levine 2008 systemic risk acharya et al 2010 idiosyncratic risk and systematic risk we employ world bank survey data on regulations to test our conjectures we find that regulatory restrictions official supervisory power capital stringency along with private monitoring can explain bank risk in both crises additionally we find that deposit insurance schemes enhance moral hazard as this encouraged banks to take on more risk and perform poorly during the sovereign debt crisis finally official supervision and private monitoring explains the returns during both crisis periods

a note on the optimum income tax abstract this paper analyzes the optimum utilitarian income tax with special attention given to the characterization of the lower end of the optimum tax function in the case when the least qualified individuals do not work moreover the positivity of the marginal tax rate throughout is shown to be a consequence of the desirability of redistribution of income or leisure given the self selection constraints and preferences fulfilling agent monotonicity and non inferiority of leisure

motivations to remit evidence from botswana in this article a theory of motivations to send remittances is described and tested with data from botswana altruism is one of the motivations tested and found to be an insufficient explanation for remittances among migrants in botswana a refinement of the model stipulates a modified altruism or enlightened self interest in this model the relationship between the migrant and family is tempered by an implicit understanding of mutual benefit the household strategy may be to encourage some members to migrate as a means of spreading risk and sharing gains the household strategy is similar to an insurance policy where migration is to places where market potential is high the risks incurred might be high the example is given of migration during a drought in botswana migrant remittances were greater in households with more cattle or households with more to lose drought alone was not statistically related to remittances increases in remittances were related to increased levels of education it is suggested that repayment was the motive for parents investment in migrants education migrants gains are identified as the potential for an inheritance the security of channeling investments through a trusted family member and security in having a home to return to it is pointed out that the altruism and family remittances from urban migration were strategies that bridged the simple dynamic of either urban development or rural development impacting on family welfare it is suggested that household models of economy adopt some measure to express the relationship of household wealth to remittances from urban migrants

remittance behaviour of forced migrants in post apartheid south africa this paper looks at the determinants of south south remittances an original dataset of african migrants living in johannesburg is used as south africa attracts both economic and forced migrants we focus on the impact of the reason of emigration violence versus economic concerns on migrants remittance behaviour on the extensive margin the results show that leaving a home country for reasons of violence decreases the probability of remitting to the home country on the intensive margin transferred amounts do not differ according to whether the migrant was forced to migrate or not when the migrant has decided to remit it is more his her current conditions in the host country and traditional factors income education sex etc that determine the amounts transferred our results are robust when restricting the definition of forced migration

what factors drive systemic risk during international financial crises abstract we analyze the determinants of the contribution of international banks to both global and local systemic risk during prominent financial crises we find no empirical evidence supporting conjectures that bank size leverage non interest income or the quality of the bank s credit portfolio are persistent determinants of systemic risk across financial crises in contrast our results show that global systemic risk in particular is predominantly driven by characteristics of the regulatory regime we also confirm for the subprime crisis that the banks contribution to moderately bad tail events in the past predicts the financial sector s crash risk

a note on the marginal tax rate in a finite economy abstract the marginal tax rate is shown to be non negative in guesnerie and seade s model of nonlinear pricing in a finite economy under assumptions that are as mild as those customarily adopted in nonlinear tax models with a one dimensional continuum population

systemic risk and bank business models textabstractin this paper we decompose banks systemic risk into two dimensions the risk of a bank bank tail risk and the link of the bank to the system in financial distress systemic linkage based on extreme value theory we estimate a systemic risk measure that can be decomposed into two subcomponents reflecting these dimensions empirically we assess the relationships of bank business models to the two dimensions of systemic risk the observed differences in these relationships partly explain why micro and macroprudential perspectives sometimes have different implications for banking regulation

the economics of fraudulent accounting we argue that earnings management and fraudulent accounting have important economic consequences in a model where the costs of earnings management are endogenous we show that in equilibrium low productivity firms hire and invest too much in order to pool with high productivity firms this behavior distorts the allocation of economic resources in the economy we test the predictions of the model using firmlevel data we show that during periods of suspicious accounting firms hire and invest excessively while managers exercise options when the misreporting is detected firms shed labor and capital and productivity improves our firm level results hold both before and after the market crash of 2000 in the aggregate our model provides a novel explanation for periods of jobless and investment less growth

a reexamination of the optimal nonlinear income tax abstract this paper investigates mirrlees model of optimal income taxation it provides a concrete example of utility and density functions for which the solution to the usual first order model is not implementable i e and example where the first order approach does not work adding second order conditions leads to an extended model and to implementable solutions if these conditions are binding one gets a kink in the optimal net income schedule and bunching of individuals occurs the properties of an optimal nonlinear income tax are reexamined within the extended model

bank capital and lending relationships this paper investigates the mechanisms behind the matching of banks and firms in the loan market and the implications of this matching for lending relationships bank capital and the provision of credit i find that bank dependent firms borrow from well capitalized banks while firms with access to the bond market borrow from banks with less capital this matching of bank dependent firms with stable banks smooths cyclicality in aggregate credit provision and mitigates the effects of bank shocks on the real economy

a pareto improving commodity tax reform under a smooth nonlinear income tax abstract this paper analyzes the welfare effects of commodity tax reform in an economy with a nonlinear income tax and linear commodity taxes the main result is that we can find a tax reform program that improves every consumer s utility in the pareto sense unless efficiency loss in the economy is minimized under incentive compatibility the tax reform rule proposed here applies to a broad class of economies with arbitrary smooth income taxes the expenditure function approach makes our analyses clear and simple some intuition is presented on the role of commodity taxation in a mixed tax economy the relationship with previous work in optimal tax and tax reform theory is also discussed we extend our result to the case where the government spends tax revenue to provide a public good

the role of corporate governance strength in crisis and non crisis times this study evaluates corporate governance practices of listed firms in the united arab emirates and investigates whether corporate governance mitigates exacerbates the impact of leverage and risk o

loan growth and riskiness of banks we investigate whether loan growth affects the riskiness of individual banks in 16 major countries using bankscope data from more than 16 000 individual banks during 1997 2007 we test three hypotheses on the relation between abnormal loan growth and asset risk bank profitability and bank solvency we find that loan growth leads to an increase in loan loss provisions during the subsequent three years to a decrease in relative interest income and to lower capital ratios further analyses show that loan growth also has a negative impact on the risk adjusted interest income these results suggest that loan growth represents an important driver of the riskiness of banks

is the optimal income tax regressive abstract a class of solutions that violates the standard results on the sign and shape of optimal tax rates is shown to be less exceptional than what might be expected thus casting doubt on the general necessity of qualitative features of income tax schedules accepted heretofore

does uniqueness in banking matter abstract we investigate whether and how the uniqueness of banking activities affects the performance and systemic risk of u s banks we find that banks performing more unique activities exhibit higher profitability and lower risk controlling for size diversification and other key characteristics we further find that banks sensitivity to systemic risk displays an inversely u shaped relation with activity uniqueness we interpret the impact of uniqueness in analogy to recent theories showing that systemic diversity promotes financial stability our study highlights the role of uniqueness in banking and has important implications for policy makers and banking regulators

remittances and the brain drain revisited the microdata show that more educated migrants remit more two of the most salient trends in migration and development over the last two decades are the large rise in remittances and in the flow of skilled migrants however recent literature based on cross country regressions has claimed that more educated migrants remit less leading to concerns that further increases in skilled migration will impede remittance growth micro data from surveys of immigrants in 11 major destination countries are used to revisit the relationship between education and remitting behavior the data show a mixed pattern between education and the likelihood of remitting and a strong positive relationship between education and amount remitted intensive margin conditional on remitting at all extensive margin combining these intensive and extensive margins yields an overall positive effect of education on the amount remitted for the pooled sample with heterogeneous results across destinations the micro data allow investigation of why the more educated remit more showing that the higher income earned by migrants rather than family characteristics explains much of the higher remittances migration brain drain and education