tetanus is an important disease which created by tetanospasmin toxin of clostridium tetani. in this study we surveyed six important factors including lf, kf, mld, ph, od and total protein assay of harvard 52 (h52), g5 (hg5) and 49205 (h49205) strains of the bacterium to determine which of them were more suitable for use in vaccine production. the mentioned strains were seperatedly reactivated i...

In this paper we study Brain Drain (BD) and Fiscal Competition (FC) in a unified framework for the European Union (EU) specific context. Potential mobility of educated workers can increase the degree of FC through taxation or the provision of public education. An increase in FC can be caused by competition among different jurisdictions that aim to attract educated workers. When the importance o...

Does Money Matter for Schools? There is considerable disagreement in the academic literature about whether raising school expenditure improves educational outcomes. Yet changing the level of resources is one of the key policy levers open to governments. In the UK, school expenditure has increased by about 40 per cent in real terms since 2000. Thus, providing an answer to the question as to whet...

This paper provides evidence against the argument that the rich prevent the poor from obtaining public education in unequal developing democracies. In Brazilian municipalities with low median incomes, voters are significantly less likely to reelect incumbent candidates from parties that increased the number of local public primary schools during their terms. This is not true for municipalities ...

Most OECD countries experience high unemployment rates and declining growth in higher educational attainment. An often suggested government policy is therefore to allocate resources towards formal schooling for adults. However, returns on such investments are uncertain and the foregone earnings are potentially large. We use Swedish population register data from 1982 to 2011 to estimate average ...

New Technology in Schools: Is There a Payoff? Despite its high relevance to current policy debates, estimating the causal effect of Information Communication Technology (ICT) investment on educational standards remains fraught with difficulties. In this paper, we exploit a change in the rules governing ICT funding across different school districts of England to devise an instrumental variable s...

Student Loans Repayment and Recovery: International Comparisons Student loans schemes are in operation in more than seventy countries around the world. Most loans schemes benefit from sizeable built-in government subsidies and, in addition, are subject to repayment default and administrative costs that are not passed on to student borrowers. We probe two issues in this paper, for 44 loans schem...

This article adds technology choice to a free-entry Cournot model with linear demand and constant marginal costs. Firms can choose from a discrete set of technologies. This simple framework yields non-existence of equilibrium, existence of multiple equilibria and equilibria in which ex-ante identical ̄rms choose di®erent technologies as possible outcomes. I provide a full characterization of th...

IZA DP No. 11281 JANUARY 2018 The Economic Effects of Providing Legal Status to DREAMers* This study quantifies the economic effects of two major immigration reforms aimed at legalizing undocumented individuals that entered the United States as children and completed high school: Deferred Action for Childhood Arrivals (DACA) and the DREAM Act. The former offers only temporary legal status to el...

This Working Paper should not be reported as representing the views of the IMF. The views expressed in this Working Paper are those of the author(s) and do not necessarily represent those of the IMF or IMF policy. Working Papers describe research in progress by the author(s) and are published to elicit comments and to further debate. This paper assesses the relative efficiency and flexibility o...