minimum wages and economic outcomes in europe abstract in this paper we review the arguments and consider evidence on the economic effects of minimum wages in europe we begin by outlining the systems of minimum wages that currently operate in european countries and then consider some evidence on the economic effects of minimum wages in four countries france the netherlands spain and the united kingdom we consider the relation between minimum wage floors and two economic outcomes employment and the distribution of income in working households we find little evidence that minimum wages have a bad effect on jobs and some evidence that they have an equalising impact on the distribution of income among families with someone in work

a note on eoq models for deteriorating items under stock dependent selling rate abstract in 1995 padmanabhan and vrat presented inventory models for deteriorating items with stock dependent selling rate and derived the profit functions without backlogging and with complete backlogging first this paper develops the necessary and sufficient conditions of the existence and uniqueness of the optimal solutions of the profit per unit time functions without backlogging and with complete backlogging second this paper explains that it is appropriate to use the newton raphson method to find the optimal solutions of the profit functions per unit time in both situations modelled

the minimum wage in formal and informal sectors evidence from an inflation shock abstract i estimate the effect of the minimum wage on formal wages informal wages and employment in colombia i exploit an unexpected increase in the real minimum wage during 1999 my analysis combines unconditional quantile regressions with a differences in differences design i find evidence of wage responses for wages close to the minimum wage the increases are present in both the informal and formal sectors and are larger in the formal one wages around the minimum increase by around 3 percent in the formal sector for a 10 percentage points larger minimum wage incidence and by around 1 percent in the informal sector these increases are smaller than those implied by full compliance to minimum wage policy but positive for some unaffected workers this suggests employers partially comply with the minimum wage and use it as a reference i find slight negative employment effects on the informal sector but not on the formal sector the effects in the informal sector are not driven by cross sectoral effects the results suggest the minimum wage has a direct impact on the informal labor market although they may not apply to minimum wage changes in other countries or contexts or to larger minimum wage increases

inventory model with stock level dependent demand rate and variable holding cost inventory models in which the demand rate depends on the inventory level are based on the common real life observation that greater product availability tends to stimulate more sales previous models incorporating inventory level dependent demand rate assume that the holding cost is constant for the entire inventory cycle this paper considers the inventory policy for an item with a stock level dependent demand rate and a storage time dependent holding cost the holding cost per unit of the item per unit time is assumed to be an increasing function of the time spent in storage two time dependent holding cost step functions are considered retroactive holding cost increase and incremental holding cost increase procedures are developed for determining the optimal order quantity and the optimal cycle time for both cost structures

an inventory model for deteriorating items with stock dependent consumption rate and shortages under inflation and time discounting this paper derives an inventory model for deteriorating items with stock dependent consumption rate and shortages under inflation and time discounting over a finite planning horizon we show that the total cost function is convex with the convexity a simple solution algorithm is presented to determine the optimal order quantity and the optimal interval of the total cost function the results are discussed with a numerical example and particular cases of the model are discussed in brief a sensitivity analysis of the optimal solution with respect to the parameters of the system is carried out

effects of the minimum wage on the employment status of youths an update the large decline in the relative value of the minimum wage during the 1980s makes that period a valuable one for identifying the impact of variation in the minimum wage on youth employment this study produces the robust finding that when the experience of the 1980s is included a 10 percent increase in the minimum wage is estimated to reduce teen employment by less than 1 percent the lower end of the range of previous estimates because this small employment effect is offset by a labor force withdrawal effect the study finds no discernible effect on measured unemployment the study also finds no apparent effect of the minimum wage on the employment of young adults aged 20 24

is the minimum wage a pull factor for immigrants in this article the author studies the effects of the minimum wage on immigration he develops an analytical framework in which immigration is a function of the expected wage in the region of destination in the analysis the author exploits the state variation in expected wages stemming from the changes in the u s federal minimum wage during 1996 1997 and 2007 2009 the author addresses endogeneity between immigration and the expected wage using an instrumental variable approach his results provide consistent evidence that the policy induced a sizeable flow of low skilled immigrants to the united states in both periods this pull is attributable to the minimum wage increasing immigrants wages without harming their potential employment outcomes the author corroborates these findings by showing that the policy did not have any impact on the flow of high skilled immigrants the effect on low skilled immigration is also found when the interstate mobility of immigrants is considered finally changes in the minimum wage only attracted legal immigrants while undocumented immigrants were not affected

who minimum wage increases bite an analysis using monthly data from the sipp and the cps 1 introduction neoclassical competitive models of firm behavior predict that wage increases reduce the quantity of labor demanded by firms and holding the wage rate constant that the least valued workers are the first fired or the last hired minimum wage legislation exogenously increases the price of labor and data from periods when the minimum wage changes can be used to empirically test its effect on the employment of vulnerable workers however a new body of research using such data suggests that minimum wage increases do not reduce employment and may even increase it card 1992a b katz and krueger 1992 card katz and krueger 1994 card and krueger 1994 1995 from a theoretical perspective this new economics of the minimum wage has been characterized as an assault on the law of demand ehrenberg 1995 if modest increases in the minimum wage have no employment effects then the appropriateness of this method in helping the working poor is strictly a distributional issue 2 however if minimum wage increases reduce employment and if the jobs lost are concentrated among the vulnerable groups the policy claims to assist then policy makers must consider this unintended consequence hence estimating the elasticity of employment with respect to minimum wage increases is more than simply an empirical test of economic theory in this paper we use monthly data from the survey of income and program participation sipp and the current population survey cps to examine the effect of raising the minimum wage on employment in contrast to much of the new minimum wage literature we find that minimum wage increases significantly reduce employment moreover we find that the elasticity of demand for labor with respect to increases in the minimum wage is greatest for the most vulnerable groups in the working age population young adults who have low levels of education young black adults and teenagers and teenagers we also find that minimum wage increases reduce the overall employment of young adults and teenagers though the estimated elasticities are smaller 2 the new economics of the minimum wage the new minimum wage literature is dominated by studies that find that minimum wage increases have an insignificant or in some cases a positive and significant effect on the employment of young adults and teenagers aged 16 24 or on other subgroups within that population card 1992a b katz and krueger 1992 card katz and krueger 1994 card and krueger 1994 1995 most of these studies have now generated replies arguing that raising the minimum wage significantly decreases employment in these populations neumark and wascher 1992 1994 1996 in press deere murphy and welch 1995 taylor and kim 1995 burkhauser couch and wittenburg in press because these new studies of the minimum wage vary widely in their techniques we focus our discussion on those that use cps data and employ an estimation strategy related to the one we use in this paper neumark and wascher 1992 1994 1996 card katz and krueger 1994 card and krueger 1995 deere murphy and welch 1995 burkhauser couch and wittenburg in press 3 specifically we review studies that use a pooled time series cross sectional approach to estimate the employment effects of minimum wage increases on vulnerable groups such as teenagers with cps data deere murphy and welch 1995 also use pooled repeated cross sectional data from the cps to estimate the impact of minimum wage increases but their specification differs in some important ways from the studies discussed above deere murphy and welch 1995 estimate the effect of minimum wage increases over the period from 1985 through 1993 they construct intervals of monthly data from 1985 through 1993 that begin on the first day of april of each year and end on the last day of match during the following year for each interval they create annual averages of variables

some results for inventory models having inventory level dependent demand rate abstract this paper considers the inventory level dependent demand rate situation in generalized eoq models an interesting result linking the total inventory cost and the optimal policy for such a frame work is obtained and is shown to be consistent for all the models discussed in the paper

risk attitudes to low probability climate change risks wtp for flood insurance abstract natural disasters may increase in frequency and severity in the future as a result of climate change which is likely to have an impact on the demand for natural disaster insurance insights about individual risk beliefs and behavioural responses to changing risks are relevant for insurers as it allows them for example to estimate the demand for new insurance products that cover weather related damage this study elicits individual risk beliefs and the demand for low probability high impact flood insurance using the contingent valuation survey method among approximately 1000 homeowners in the dutch river delta this study is of practical relevance since currently flood insurance is not available in the netherlands while insurers have been considering to provide such insurance individuals generally do not behave in accordance with the expected utility model since a significant proportion of homeowners neglect the low probability flood risk the willingness to pay wtp of those individuals who demand flood insurance is on average considerably higher than the expected value of the flood risk they face moreover the wtp for flood insurance is less than proportionally related to increased flood probabilities that were presented to respondents in the questionnaire individuals follow a process of bayesian updating of flood probabilities since perceptions of flood risk are an important determinant of the wtp while objective risks derived from geographical characteristics influence the wtp to a lesser extent communication of baseline probabilities and changes in flood probabilities using risk ladders facilitate the comprehension of risk by respondents and has a considerable effect on the level of the wtp and its sensitivity to probability changes the results indicate that the current ex post public compensation scheme of flood damage lowers demand for private insurance

using regional variation in wages to measure the effects of the federal minimum wage the imposition of a national minimum wage standard provides a natural experiment in which the treatment effect varies across states depending on the fraction of workers initially earning less than the new minimum the author exploits this fact to evaluate the effect of the april 1990 increase in the federal minimum wage on teenagers wages employment and school enrollment comparisons of grouped and individual state data confirm that the rise in the minimum wage increased teenagers wages there is no evidence of corresponding losses in teenage employment or changes in teenage school enrollment

inventory models with inventory level dependent demand a comprehensive review and unifying theory marketing researchers and practitioners have long recognized the demand of many retail items is proportional to the amount of inventory displayed recently two distinct types of inventory control models reflecting this relationship have appeared in the literature models in which the demand rate of an item is a function of the initial inventory level and those in which it is dependent on the instantaneous inventory level we present a comprehensive overview of this literature and demonstrate the equivalence of the two types of models through the use of a simple periodic review model an alternative approach to sensitivity analysis for inventory models with inventory level dependent demand is also presented

ordering quantity decisions considering uncertainty in supply chain logistics operations abstract this research seeks to determine the optimal order amount for a retailer given uncertainty in a supply chain s logistics network due to unforeseeable disruption or various types of defects e g shipping damage missing parts and misplacing products mixture distribution models characterize problems from solitary failures and contingent events causing network to function ineffectively the uncertainty in the number of good products successfully reaching distribution centers dcs and retail stores poses a challenge in deciding product order amounts because the commonly used ordering plan developed for maximizing expected profits does not allow retailers to address concerns about contingencies this research proposes two improved procedures with risk averse characteristics towards low probability and high impact events several examples illustrate the impact of a dc s operation policies and model assumptions on a retailer s product ordering plan and resulting sales profit

reconciling the evidence of card and krueger 1994 and neumark and wascher 2000 we employ the original card and krueger american economic review 1994 84 772 793 and neumark and wascher american economic review 2000 90 1362 1396 data together with the changes in changes estimator to re examine the evidence for the effect of minimum wages on employment our study reconciles the controversial positive average employment effect reported by the former study and the negative average employment effect reported by the latter study our main finding which is supported by both datasets is that the controversial result remains valid only for small fast food restaurants copyright 2011 john wiley sons ltd

the effectiveness of hiring credits this article analyses the effectiveness of hiring credits using comprehensive administrative data we show that the french hiring credit implemented during the great recession had significant positive employment effects and no effects on wages relying on the quasi experimental variation in labour cost triggered by the hiring credit we estimate a structural search and matching model simulations of counterfactual policies show that the effectiveness of the hiring credit relied to a large extent on three features it was non anticipated temporary and targeted at jobs with rigid wages we estimate that the cost per job created by permanent hiring credits either countercyclical or time invariant in an environment with flexible wages would have been much higher

inventory decisions for substitutable products with stock dependent demand abstract we study a retailer s inventory policy for two products the products are substitutable and have inventory dependent demand so a higher inventory level of a product increases its sales we model the joint effect of demand stimulation and product substitution on inventory decisions by considering a single period stochastic demand setting we provide the first order optimality conditions for the profit maximizing order quantities and interpret them using marginal analysis we also consider two heuristic solutions that separately account for either demand stimulation or product substitution our numerical analysis reveals that the optimal policy by appropriately using sales information that quantifies substitution and demand stimulation can produce significantly higher profits the profit benefits are lessened under certain circumstances such as when the two products have similar critical fractile values suggesting that in such instances the heuristics may be used effectively

the effect of the minimum wage on the fast food industry using a longitudinal survey of fast food restaurants in texas the authors examine the impact of recent increases in the federal minimum wage on a low wage labor market less than 5 of fast food restaurants were using the new youth subminimum wage in july august 1991 even though the vast majority paid a starting wage below the new hourly minimum wage immediately before it became effective although some restaurants increased wages beyond the level needed to comply with higher minimum wages in both 1990 and 1991 those federal minimum wage increases greatly compressed the distribution of starting wages in the texas fast food industry two findings at variance with conventional predictions are that 1 employment increased more in those firms likely to have been most affected by the 1991 minimum wage increase than in other firms and 2 price changes were unrelated to mandated wage changes

the effects of minimum wages on the distribution of family incomes a nonparametric analysis an oft stated goal of the minimum wage is to raise incomes of poor or low income families we present nonparametric estimates of the effects of minimum wages on the distribution of family income relative to needs in the united states although minimum wages increase the incomes of some poor families the evidence indicates that their overall net effect is if anything to increase the proportions of families with incomes below or near the poverty line it would appear that reductions in the proportions of families that are poor or near poor should not be counted among the potential benefits of minimum wages

extreme event risk management a review of lee b preston f 2012 preparing for high impact low probability events lessons from eyjafjallajőkull london chatham house abstract this paper provides a short communication based on a review of bernice lee and felix preston with gemma green 2012 this white paper received 36 survey responses from businesses related to the impact of the eyjafjallaj kull volcano most reported negative profit impacts although 47 reported that it took less than a week to return to normal operations this volcanic incident represents events that have significant impact on supply chains that have low enough rates of occurrence that they cannot be expected to be forecast therefore there is a great deal of value to put the organization in a position to adapt to whatever might occur and to have contingency plans in effect

mapping the cost risk of agricultural residue supply for energy application in rural china this research aims to shed light on the interaction mechanism of cost risks for biomass material supply in power generation especially for biomass coal dual fuel systems firstly a game model is established to analyze interactions among factors including unit procurement cost unit transportation cost basic price and coal price for crop residue collection secondly a monte carlo simulation is implemented to compare the profit increase under material competition with that under price alliance the methodology is illustrated with a case study in a biomass power plant in shandong province china it shows that developing a price alliance will benefit both the allied enterprises and the local collection area in most circumstances thirdly a risk tolerance area approach is applied in mapping the cost risk and in explaining the risky circumstances of the case study

minimum wages and tipped servers tips allow restaurants to pay servers lower wages as more servers are hired each serves fewer meals and earns less in tips as a result restaurants must pay a higher wage this gives them monopsony power over wages over some range a higher minimum wage should increase employment empirically we found the full reverse c monopsony pattern of employment for restaurants with employment first going up and then down as the minimum wage is increased

the international experience of minimum wages in an economic downturn what should governments do with the level of the minimum wage mw in times of recession in an economic downturn when most workers face falling real wages is it appropriate to let the mw fall or are the positive effects of the mw on inequality enough to justify its uprating and if so what might be the consequences on a country s employment level this paper reports new estimates of the employment effects of the mw by focusing on the recessionary experiences across countries using international data we exploit cross national variation in the level and timing of the mw uprating and the exact timing of the recessionary experiences in different countries with a panel data set comprising 33 oecd over the period 1971 2009 our panel data allow us to differentiate the effect of mws on employment in periods of economic downturn as well as periods of economic growth we also account for institutional and other policy related differences that might have an impact on employment other than the mw we find that the answer depends on whether one considers adults or young people and to some extent on what measure of the mw is considered the answer is also somewhat sensitive to whether one considers that the mw level is a choice option of the government which is inextricably interrelated to the determination of employment that is the extent to which the mw is endogenous using a political complexion of the government instrumental variable iv we find that the mw only has a negative impact on youth employment this leaves each government with the dilemma of raising the mw and reducing inequality or increasing the mw and accepting that this will reduce employment levels amongst young people and those on the margins of work peter dolton and chiara rosazza bondibene

inventory models with the demand rate dependent on stock and shortage levels this paper investigates an inventory system in which the demand rate during stockout periods differs from that during the in stock period by a given amount the previous analysis conducted in this area formulated the model as a cost minimization model this type of formulation will intentionally try to decrease demand by increasing the stockout period in order to decrease costs this paper appropriately considers the model as a profit maximization model and develops a closed form solution the model is then further generalized to incorporate the effect of stock level dependent demand rates and considers initial stock dependent demand as well as instantaneous stock dependent demand rates

the effect of minimum wages on immigrants employment and earnings this study examines how minimum wage laws affect the employment and earnings of low skilled immigrants and natives in the u s minimum wage increases might have larger effects among low skilled immigrants than among natives because on average immigrants earn less than natives due to lower levels of education limited english skills and less social capital results based on data from the current population survey for the years 1994 2005 do not indicate that minimum wages have adverse employment effects among adult immigrants or natives who did not complete high school however low skilled immigrants may have been discouraged from settling in states that set wage floors substantially above the federal minimum jel classifications j23 j38 j15

do minimum wages affect non wage job attributes evidence on fringe benefits although many studies have tested neoclassical labor market theory s prediction that employers will react to binding minimum wages by reducing employment levels much less empirical research has explored the possibility that employers also respond to minimum wages by adjusting non wage components of the job such as fringe benefits job safety and access to training using current population survey data for 1979 2000 this study investigates the effect of minimum wage legislation on the provision of employer health insurance and employer pension coverage the authors examine effects of state and federal variation in minimum wages on groups likely to be affected by the minimum wage and compare these effects to estimates found for groups unlikely to be affected whether the analysis uses only state level variation or federal and state variation in minimum wages the results indicate no discernible effect of the minimum wage on fringe benefit generosity for low skill workers

demand promotion by upgradation under stock dependent demand situation a model the idea of demand promotion by upgrading the existing system of the selling centre has been modelled in this article the consumption rate is assumed to be dependent on the stock level the problem has been reduced to a maximizing problem the algorithmic approach for solving this maximizing problem is also provided objective is to maximize the net profit over a prescribed time an increasing convex upgradation cost is considered exponential upgradation cost has been considered for the numerical examples

stack them high let em fly lot sizing policies when inventories stimulate demand in some retail contexts stocking large quantities of inventory may not only improve service levels but can also stimulate demand for products having demand rates that increase with inventory levels we analyze the effect of stocking decisions on firm profitability to develop managerial insights regarding the structure of the optimal inventory policy and to understand how this policy differs from traditional approaches when inventories stimulate demand iteratively applying the standard economic order quantity eoq model by setting the demand rate parameter equal to the observed average demand rate in prior cycles yields an equilibrium order quantity that is robust to demand parameter misestimation but is suboptimal the profit maximizing policy orders larger quantities and can replenish inventory even before on hand stock fully depletes using an extension of a standard inventory dependent demand model from the literature we first provide a convenient characterization of products that require early replenishment we demonstrate that the optimal cycle time is largely governed by the conventional trade off between ordering and holding costs whereas the reorder point relates to a promotions oriented cost benefit perspective we show that the optimal policy yields significantly higher profits than cost based inventory policies underscoring the importance of profit driven inventory management

eoq models with general demand and holding cost functions abstract we consider the continuous deterministic infinite horizon single item inventory system within the setting of a retail sector in which the demand rate for an item is dependent on the existing inventory level the traditional parameter of the replenishment cost is kept constant but the carrying cost per unit is allowed to vary two possibilities of variation are considered a a non linear function of the length of time the item is held in inventory and b a non linear function of the amount of on hand inventory we find the optimal policies and decision rules and show that the classical eoq model is obtained as a limiting case

who benefits from a minimum wage increase this paper addresses the question of how a minimum wage increase affects the wages of low wage workers most studies assume that there is a simple mechanical increase in the wage for workers earning a wage between the old and the new minimum wage with some studies allowing for spillovers to workers with wages just above this range rather than assume that the wages of these workers would have remained constant this paper estimates how a minimum wage increase impacts a low wage worker s wage relative to the wage the worker would have if there had been no minimum wage increase the method allows for the effect to depend not only on the initial wage of the worker but also nonlinearly on the size of the minimum wage increase using current population survey data from 2005 to 2008 a period with a large number of u s state level minimum wage increases this paper finds that low wage workers who experience a small increase in the minimum wage tend to have lower wage growth than if there had been no minimum wage increase a large increase to the minimum wage increases the wages of not only those workers who previously earned less than the new minimum wage but also spill over to workers with moderately higher wages finally this paper finds little evidence of heterogeneity in the effect by age gender income and race

the impact of the minimum wage on other wages in this paper i explore how changes in the minimum wage affect various occupational wages i postulate that other wages increase for two reasons first firms try to mitigate the deterioration in a worker s relative wage which would cause him to reduce his work effort and second there is an increase in the demand for nonminimum wage workers wage adjustment patterns are examined to ascertain whether wage comparisons play a role in the adjustment process the empirical work shows a short run wage compression among white collar occupations which is consistent with the wage comparison model however large standard errors make inferences weak