frictionless commerce a comparison of internet and conventional retailers there have been many claims that the internet represents a new nearly frictionless market our research empirically analyzes the characteristics of the internet as a channel for two categories of homogeneous products books and cds using a data set of over 8 500 price observations collected over a period of 15 months we compare pricing behavior at 41 internet and conventional retail outlets we find that prices on the internet are 9 16 lower than prices in conventional outlets depending on whether taxes shipping and shopping costs are included in the price additionally we find that internet retailers price adjustments over time are up to 100 times smaller than conventional retailers price adjustments presumably reflecting lower menu costs in internet channels we also find that levels of price dispersion depend importantly on the measures employed when we compare the prices posted by different internet retailers we find substantial dispersion internet retailer prices differ by an average of 33 for books and 25 for cds however when we weight these prices by proxies for market share we find dispersion is lower in internet channels than in conventional channels reflecting the dominance of certain heavily branded retailers we conclude that while there is lower friction in many dimensions of internet competition branding awareness and trust remain important sources of heterogeneity among internet retailers

the retail price of inequality abstract this paper studies the relation between a city s income distribution and its retail price level using panel data we find that an increase in the presence of lower middle income households relative to poor or upper income households is associated with lower prices our findings suggest that greater income inequality raises the prices that poor households face thus making it harder for them to invest in human capital

demand information and competition why do food prices fall at seasonal demand peaks prices for seasonal food products fall at demand peaks price declines are not driven by falling agricultural input prices indeed farm to retail margins narrow sharply i use electronic scanner data from a sample of us supermarkets to show that seasonal price declines are closely linked to market concentration and are much larger in markets with several rivals than where a single brand dominates seasonal demand increases reduce the effective costs of informative advertising and increased informative advertising by retailers and manufacturers in turn may allow for increased market information and greater price sensitivity on the part of buyers

pricing in a customer market in standard pricing models movements in demand are partially offset by price responses in a customer market however price markups may decrease with high demand thus price may magnify rather than stabilize demand movements i consider a monopolist selling a good of which first time consumers are uncertain repeat customers know that the product works the monopolist trades the objectives of exploiting past customers and attracting new ones in a period with many new potential customers the monopolist gives more weight to attracting and lowers its markup last i examine some evidence on whether expansions are periods with disproportionately many new customers

the effect of immigration along the distribution of wages this paper analyses the effect immigration has on wages of native workers unlike most previous work we estimate wage effects along the distribution of wages we derive a flexible empirical strategy that does not rely on pre allocating immigrants to particular skill groups in our empirical analysis we demonstrate that immigrants downgrade considerably upon arrival as for the effects on native wages we find that immigration depresses wages below the 20th percentile of the wage distribution but leads to slight wage increases in the upper part of the wage distribution the overall wage effect of immigration is slightly positive the positive wage effects we find are although modest too large to be explained by an immigration surplus we suggest alternative explanations based on the idea that immigrants are paid less than the value of what they contribute to production generating therefore a surplus and we assess the magnitude of these effects

oligopolistic markets with sequential search and production cost uncertainty this article analyzes a sequential search model where firms face identical but stochastic production costs the realizations of which are unknown to consumers we characterize a perfect bayesian equilibrium satisfying a reservation price property and provide a sufficient condition for such an equilibrium to exist we show that i firms set on average higher prices and make larger profits compared to the scenario where consumers observe production costs ii expected prices and consumer welfare can be non monotonic in the number of firms and iii the impact of production cost uncertainty vanishes as the number of firms becomes very large

the behavior of prices and inflation an empirical analysis of disaggregat price data this paper analyzes the effects of inflation on the dispersion of prices as well as other aspects of price behavior using disaggregated data on prices of foodstuffs in israel during 1978 84 we find that the effect of expected inflation on intramarket price variability is stronger than the effect of unexpected inflation we show that even in times of high inflation price quotations are not trivially short and price changes are not synchronized across firms these facts taken together confirm that there is some staggering in the setting of prices we find that the distribution of real prices is far from being uniform as many menu cost based models assume or conclude in fact as inflation increases to very high levels this distribution is not even symmetric when the annual inflation rate reaches 130 percent there are equal chances of finding real prices above or below the market average but upward deviations in the real price are further away from zero than downward ones furthermore as the annu

the economic impact of syrian refugees on host countries quasi experimental evidence from turkey abstract the syrian conflict generated forced immigration from northern syria to southeastern turkey arrival of refugees resembles a natural experiment which offers good opportunities to study the economic impact of immigration i study three main outcomes labor markets consumer prices and housing rents i document moderate employment losses among native informal workers which suggests that they are partly substituted by refugees prices of the items produced in informal labor intensive sectors declined due to labor cost advantages generated by refugee inflows finally refugee inflows increased the rents of higher quality housing units while there is no effect on lower quality units

buying less but shopping more the use of nonmarket labor during a crisis households allocating time between market and non market uses should respond to income variations by adjusting the time devoted to shopping search and other home production activities in this paper we exploit high frequency household expenditure data to examine the use of changes in shopping intensity as a method of mitigating the effects of the 2002 argentine economic crisis although the total quantity and real value of goods purchased fell during the crisis consumers are found to be doing more shopping search this increase in shopping is shown to enable households to seek out lower prices and locate substitutes allowing a given level of expenditure to buy more goods the magnitude and prevalence of these effects suggest that this non market use of labor can be an important coping strategy for households during a recession

prices and price dispersion on the web evidence from the online book industry using data collected between august 1999 and january 2000 covering 399 books we examine pricing by thirty two online united states based bookstores at the aggregate level we find that both advertising and competitive structure had the predicted effects more competition led to lower prices and to lower price dispersion holding competitive structure constant more widely advertised items also had lower prices at the firm level we observe considerable heterogeneity in behavior firms had differentiated or attempted to differentiate on dimensions such as brand price and selection

immigration and prices this paper examines the behavior of prices following the unexpected arrival of a large number of immigrants from the former soviet union fsu to israel during 1990 i use store level price data on 915 consumer price index products to show that the increase in aggregate demand prompted by the arrival of the fsu immigration significantly reduced prices during 1990 when one controls for native population size and city and month effects a one percentage point increase in the ratio of immigrants to natives in a city decreases prices by 0 5 percentage point on average it is argued that this negative immigration effect is consistent with fsu immigrants the new consumers having higher price elasticities and lower search costs than the native population thus immigration can have a moderating effect on inflation through its direct effect on product markets and not only by increasing the supply of labor

installed base and compatibility innovation product preannouncements and predation a good is often more valuable to any user the more others use compatible goods the authors show that this effect may inhibit innovation if an installed base exists and transition to a new standard must be gradual early adopters bear a disproportionate share of transient incompatibility costs this can produce excess inertia the installed base however is stranded if the new standard is adopted this may create excess momentum these dynamic effects have strategic implications temporary price cutting can permanently prevent entry and product preannouncements can be critical in innovation these strategic actions have ambiguous welfare effects

the timing and magnitude of retail store markdowns evidence from weekends and holidays we examine daily prices of eight goods at seventeen retail stores collected in ann arbor michigan over a four month period from november 1 to february 28 we focus on weekly and seasonal price patterns and on the frequency of price markdowns or sales there were frequent markdowns in the intensive shopping period prior to christmas and a tendency for such sales to occur on weekends we interpret these findings as evidence that a significant number of markdowns are timed to occur when shopping intensity is exogenously high we complement the imperfect information based motives for sales in the literature by contributing an additional element based on the role of bulk shopping and increasing returns in the shopping technology

inelastic buyers and competition we precisely measure how competition limits the capacity of sellers to appropriate surplus from less elastic consumers the evidence originates from pricing strategies of italian pharmacists in response to exogenous inflows of parents of newborn babies among their buyers population based laws allow us to use a rdd to compare different competitive environments while more newborn babies have no effect on the price of hygiene products under intense competition we observe a price increase when competition is low this effect is not driven by increasing costs because for diapers demanded by newborns only we see no effect independently of competition this article is protected by copyright all rights reserved

durable goods monopoly with varying demand this paper solves for the proflt maximising strategy of a durable goods monopolist when incoming demand varies over time each period additional consumers enter the market these consumers can then choose whether and when to purchase we flrst characterise the consumer s utility maximisation problem and under a monotonicity condition show the proflt maximising allocation can be solved through a myopic algorithm which has an intuitive marginal revenue interpretation consumers ability to delay creates an asymmetry in the optimal price path which exhibits fast increases and slow declines this asymmetry pushes the price level above that charged by a flrm facing the average level of demand applications of this framework include deterministic demand cycles one ofi shocks and iid demand draws the optimal policy outperforms renting and can be implemented by a time consistent best price provision

the impact of the 1962 repatriates from algeria on the french labor market this paper uses census data to examine the impact on the french labor market of the 900 000 people repatriated from algeria in 1962 repatriates settled in regions culturally and climatically simil

skilled immigration and the employment structures of u s firms we study the impact of skilled immigrants on the employment structures of us firms using matched employer employee data unlike most previous work we use the firm as the lens of analysis to account for greater heterogeneity and the fact that many skilled immigrant admissions are driven by firms themselves e g the h 1b visa ols and iv specifications show rising overall employment of skilled workers with increased skilled immigrant employment by the firm employment expansion is greater for young natives than for their older counterparts the departure rates for older workers relative to younger workers appear highest for those in stem occupations

the effect of immigration on unskilled native workers evidence from a natural experiment this study exploits the natural experiment provided by the start of the second intifada to measure the effect of immigration on the wage and employment of unskilled native workers it finds that immigration has no effect on the wage or employment of unskilled jewish workers the wage and employment of the least skilled israeli arab workers with zero to five years of schooling are adversely affected by immigration the slightly more skilled arab workers with six to 11 years of schooling in contrast are positively affected by immigration suggesting a complementarity effect with this group different explanations are proposed

immigration search and loss of skill this article develops and estimates an on the job search model of the entry of highly skilled immigrants from the former soviet union into the israeli labor market the estimated parameters of the model together with information on the wages of immigrants from earlier waves imply that on average immigrants can expect lifetime earnings to fall short of the lifetime earnings of comparable natives by 57 of this figure 14 percentage points reflect frictions associated with nonemployment and job distribution mismatch and 43 percentage points reflect the gradual adaptation of imported schooling and experience to the local labor market

immigration and international prices an initial assessment abstract using prices from a number of cities across the world during 1990 2006 this paper shows that there exists a negative impact of immigration on prices the estimated absolute elasticity of prices with respect to immigration is around 14 across specifications

adoptions and orphans in the early microcomputer market in this paper we examine the development of the microcomputer market in the early 1980s cp m a widely adopted operating system was orphaned by the user and the development communities a new operating system dos and a new hardware platform the ibm pc became the predominant industry standard we examine the statistical relationship between data that reflects hardware and software sales for the competing platforms we conclude that the economic processes underlying the development of dos differed from those underlying cp m and that many of these differences related to the role of software development

working less and bargain hunting more macro implications of sales during japan s lost decades standard new keynesian models have often neglected temporary sales in this paper we ask whether this treatment is appropriate in the empirical part of the paper we provide evidence using japanese scanner data covering the last two decades that the frequency of sales was closely related with macroeconomic developments specifically we find that the frequency of sales and hours worked move in opposite directions in response to technology shocks producing a negative correlation between the two we then construct a dynamic stochastic general equilibrium model that takes households decisions regarding their allocation of time for work leisure and bargain hunting into account using this model we show that the rise in the frequency of sales which is observed in the data can be accounted for by the decline in hours worked during japan s lost decades we also find that the real effect of monetary policy shocks weakens by around 40 due to the presence of temporary sales but monetary policy still matters

is american health care uniquely inefficient evidence from prescription drugs abstract alan garber and jonathan skinner 2008 famously conjectured that the us health care system was uniquely inefficient relative to other countries we test this idea using cross country data on prescription drug sales newly linked with an arguably objective measure of relative therapeutic benefits or drug quality specifically we investigate how higher and lower quality drugs diffuse in the us relative to australia canada switzerland and the uk our tabulations suggest that lower quality drugs diffuse more in the us relative to high quality drugs compared to each of our four comparison countries consistent with garber and skinner s conjecture

short run demand for palestinian labor palestinian residents of the west bank and gaza strip who work in israel generally earn more than palestinians employed locally but this wage premium is highly volatile beginning with the 1987 palestinian uprising changes in wage differentials by work location parallel palestinian absences from work in israel this article interprets changing location differentials in response to exogenous shocks as movements along an israeli demand curve for migrant workers estimates of a model of the west bank and gaza strip labor market are used to evaluate the effect of policies governing palestinian access to the israeli labor market

pharmaceutical price controls and entry strategies abstract this paper finds that the use of price controls has a statistically and quantitatively important effect on the extent and timing of the launch of new drugs firms headquartered in countries that regulate price reach fewer markets than those in countries without price controls companies avoid price controlled markets and are less likely to introduce products in additional markets after entering a price controlled country launches into low price european countries are further delayed following legalization of parallel imports the results suggest that price regulation in one country affects entry into other countries and may affect the strategies of domestic firms

an introduction to the economics of immigration in oecd countries the share of the foreign born in oecd countries is increasing and this article summarizes economics research on the effects of immigration in those nations four broad topics are addressed labor market issues fiscal questions the political economy of immigration and productivity international trade extreme concerns about deleterious labour market and fiscal impacts following from new immigrants are not found to be warranted however it is also clear that government policies and practices regarding the selection and integration of new migrants affect labour market fiscal and social cultural outcomes policies that are well informed well crafted and well executed beneficially improve population welfare

immigrants minorities and labor market competition this paper investigates the extent of labor market competition among immigrants minorities and the native population an analysis of 1980 u s census data reveals that immigrants tend to be substitutes for some labor market groups and complements for others the effects of shifts in immigrant supply on the earnings of native born men are however very small on the other hand increases in the supply of immigrants do have a sizable impact on the earnings of immigrants themselves an increase of 10 percent in the supply of immigrants for example reduces the immigrant wage by about 10 percent

number of sellers average prices and price dispersion abstract a variety of models provide differing predictions regarding the effect of an increase in the number of competitors in a market seller density on prices and price dispersion we review different approaches to generating equilibrium price dispersion and then empirically estimate the relationship between seller density average product price and price dispersion in the retail gasoline industry using four unique gasoline price data sets controlling for station level characteristics we find that an increase in station density consistently decreases both price levels and price dispersion across four geographical areas

increasing returns path dependence and the study of politics it is increasingly common for social scientists to describe political processes as path dependent the concept however is often employed without careful elaboration this article conceptualizes path dependence as a social process grounded in a dynamic of increasing returns reviewing recent literature in economics and suggesting extensions to the world of politics the article demonstrates that increasing returns processes are likely to be prevalent and that good analytical foundations exist for exploring their causes and consequences the investigation of increasing returns can provide a more rigorous framework for developing some of the key claims of recent scholarship in historical institutionalism specific patterns of timing and sequence matter a wide range of social outcomes may be possible large consequences may result from relatively small or contingent events particular courses of action once introduced can be almost impossible to reverse and consequently political development is punctuated by critical moments or junctures that shape the basic contours of social life

existence and persistence of price dispersion an empirical analysis the hebrew university of jerusalem and nber using a unique data set on store level monthly prices of four homogenous products sold in israel i study the existence and characteristics of the dispersion of prices across stores as well as its persistence over time i find that price dispersion prevails even after controlling for observed and unobserved product heterogeneity moreover intra distribution mobility is significant stores move up and down the cross sectional price distribution thus consumers cannot learn about stores that consistently post low prices as a consequence price dispersion does not disappear and persists over time as predicted by varian s 1980 model of sales

displaced populations humanitarian assistance and hosts a framework for analyzing impacts on semi urban households summary this paper presents a framework for understanding the impacts of civil war displaced populations and humanitarian assistance on host populations in semi urban areas our model shows that under conditions of conflict where populations flow from rural to urban areas and food aid follows changes in food housing and labor markets result in changes to local prices which will potentially impoverish consumers but provide earning opportunities for property owners and suppliers of non tradable goods and that the price dynamics are likely to induce significant land use change we combine satellite price aid delivery and population inflow data with qualitative interviews from nyala darfur the data confirm the hypotheses and the paper discusses possible policy responses

three attempts at de wintelization japan s tron project the us government s suits against wintel and the entry of java and linux abstract the dominance over personal computing technology by the microsoft os and the intel mpu or wintel has been a long standing concern of the government and the marketplace in the past 15 years there have been at least three attempts to challenge the wintel monopoly in comparing these three attempts at de wintelization this paper raises interrelated issues about innovation 1 the path dependent nature of innovation especially that due to network externalities 2 the balance between property rights and antitrust laws and 3 the relevance of government intervention in these areas it also examines different types of r d organization

patents and the global diffusion of new drugs analysis of the timing of launches of 642 new drugs in 76 countries during 1983 2002 shows that patent and price regulation regimes strongly affect how quickly new drugs become commercially available in different countries price regulation delays launch while longer and more extensive patent rights accelerate it health policy institutions and economic and demographic factors that make markets more profitable also speed up diffusion the estimated effects are generally robust to controlling for endogeneity of policy regimes with country fixed effects and instrumental variables the results highlight the important role of policy choices in driving the diffusion of new innovations

unexpected guests the impact of internal displacement inflows on rental prices in colombian host cities abstract we study the causal impact of internally displaced people idp inflows on rental prices in colombian host cities following an instrumental variables approach we find that as idp inflows increase low income rental prices increase and high income rental prices decrease we provide empirical evidence on two potential mechanisms for these findings excess demand for low income housing puts upwards pressure on rental prices increasing supply of high income housing coupled with rising homicide rates put downwards pressure on rental prices

immigration and international prices abstract this paper considers the relation between immigration and prices in a number of countries across the world over the period from 1990 to 2006 immigration is shown to have a negative impact on international relative prices a 10 increase in the share of immigrant workers in total employment decreases the prices of final products by as much as 3 our results suggest that the tendency of this factor of production to relocate to relatively expensive high wage countries exerts downward pressure on prices of tradeables and non tradeables there relative to other locations the effect of immigration on prices is more evident for goods consumed by immigrants as compared to goods produced by immigrants

oligopolistic pricing with sequential consumer search n identical stores compete by choosing prices for a homogeneous good with constant marginal costs consumers search sequentially with perfect recall for the lowest price one class of consumers called shoppers have zero search costs while all other consumers have a positive search cost c there is a unique symmetric nash equilibrium price distribution with the property that it changes smoothly from marginal cost pricing when all consumers are shoppers and or c 0 and monopoly pricing when no consumers are shoppers remarkably as the number of stores increases the nash equilibrium becomes more monopolistic copyright 1989 by american economic association

the impact of mass migration on the israeli labor market mass migration from the former soviet union increased the israeli population by 12 in the first half of the 1990s this exodus was precipitated by the lifting of emigration restrictions in an unstable ussr and by the open immigration policy of israel toward soviet jews who faced more restrictive entry policies elsewhere i use this natural experiment to study the impact of immigration on the labor market outcomes of native israelis ols yields significant reductions in wages and small reductions in employment however ols is biased if the distribution of immigrants across occupations in israel was not exogenous to relative wage and employment conditions i instrument for the entry of russians into an occupation in israel using information on their former occupations in the ussr there is a significant positive correlation between the former presence of the immigrants in an occupation in the ussr and their presence in that occupation in israel but the previous occupational choices of russians abroad were independent of israeli wage and employment growth subsequent to their migration iv estimates indicate that immigration did not have an adverse impact on native israeli labor market outcomes

not just a work permit eu citizenship and the consumption behavior of documented and undocumented immigrants this paper explores the impact of the 2007 european union enlargement on the consumption behavior of immigrant households using data from a unique italian survey and a difference in differences approach we find that the enlargement induced a significant consumption increase for the immigrant households from new member states both in the short and in the medium run this enlargement effect cannot be attributed to the mere legalization as it concerns both undocumented and documented immigrants albeit through different channels detailed information on immigrants legal status undocumented documented and sector of employment informal formal allows us to shed light on the exact mechanisms following the enlargement previously undocumented immigrants experienced an increase in the labor income by moving from the informal towards the formal economy whereas immigrants who were already working legally in italy benefitted from the increased probability of getting a permanent contract enhanced employment stability in turn reduced the uncertainty about future labor income leading to an increase in documented immigrants consumption expenditure

the impact of forced displacement on host communities a review of the empirical literature in economics the paper reviews 49 empirical studies that estimate the impact of forced displacement on host communities a review of the empirical models used by these studies and a meta analysis of 762 separate results collected from them are the main contributions of the paper coverage extends to 17 major forced displacement crises that occurred between 1922 and 2015 to host countries at different levels of economic development and different types of forced migrants the focus is on outcomes related to household well being prices employment and wages all studies can be classified as ex post quasi natural experiments the analysis on empirical modeling shows a preference for partial equilibrium modeling differences in differences evaluation methods and cross section econometrics with all these choices largely dependent on the type of data available the meta analysis on household well being shows that between 45 and 52 percent of the results are positive and significant indicating a net improvement in household well being an additional 34 to 42 percent of the results are found to be nonsignificant and 6 to 20 percent show a decrease in household well being the analyses on employment and wages show positive and significant improvements for 12 to 20 percent of the results nonsignificant results in 63 percent of the cases and negative and significant results for 22 to 25 percent of the results negative results on employment and wages relate to young and informal workers in middle income countries the results on prices show asymmetric behavior across types of products overall the probability of having a negative outcome for host communities in the consumer and labor markets is below 20 percent

does school quality matter returns to education and the characteristics of public schools in the united states this paper estimates the effects of school quality measured by the pupil teacher ratio average term length and relative teacher pay on the rate of return to education for men born between 1920 and 1949 using earnings data from the 1980 census we find that men who were educated in states with higher quality schools have a higher return to additional years of schooling rates of return are also higher for individuals from states with better educated teachers and with a higher fraction of female teachers holding constant school quality measures however we find no evidence that parental income or education affects average state level rates of return

the effect of low skilled immigration on u s prices evidence from cpi data i exploit the large variation across u s cities and through time in the relative size of the low skilled immigrant population to estimate the causal effect of immigration on prices of nontraded goods and services using an instrumental variables strategy i find that at current immigration levels a 10 percent increase in the share of low skilled immigrants in the labor force decreases the price of immigrant intensive services such as housekeeping and gardening by 2 percent wage equations suggest that lower wages are a likely channel through which these effects take place however wage effects are significantly larger for low skilled immigrants than for low skilled natives implying that the two are imperfect substitutes

historical origins of firm ownership structure the persistent effects of the african slave trade this paper uses evidence from the historical african slave trade to extend prior theory linking modern firm ownership structure to institutions and social capital we argue that institutions and so

technological innovations and sectoral change transformative capacity adaptability patterns of change an analytical framework following up on recent debates about sectoral systems of innovation and production the paper introduces a heuristic framework for analyzing and explaining distinct patterns of technology based sectoral change the concept is based on two interrelated influencing factors the first is the sectoralspecific transformative capacity of new technologies themselves that is their substantial or incremental impact on socioeconomic and institutional change in a given sectoral system the second is the sectoral adaptability of socioeconomic structures institutions and actors confronted with the opportunities presented by new technologies the first factor the sectoral transformative capacity of new technologies enables us to identify the technology based pressure to change and adjust the structural institutional and organizational architectures of the sectoral system the second complementary factor sectoral adaptability helps us to discern the distinct social patterns of anticipating and adopting this technology based pressure the specific interplay between the two influencing factors creates distinguishable modes of sectoral transformation ranging from anticipative and smooth adjustments to reactive and crisis ridden patterns of change even processes of radical sectoral change continue over longer periods of mismatch and are characterized by numerous and mostly gradual organizational structural and institutional transformations

staggering and synchronization in price setting evidence from multiproduct firms theoretical work on price setting behavior focuses on the single product case while in reality a single price setter sells many products the authors use retail store level multiproduct pricing data to learn about price dynamics they find that while the timing of a product s price changes is staggered across stores selling the same product the timing of the price changes of different products sold within the same store is highly synchronized this finding validates the usual assumption that decisions are staggered across price setters and suggests that price rigidity is due mostly to mechanical reasons and not to informational asymmetries copyright 1996 by american economic association

room in the kitchen for the melting pot immigration and rental prices this paper studies the response of housing markets to immigration shocks following card 1990 i examine the changes in rental prices in miami and three comparison groups after the mariel boatlift this exogenous immigration shock added an extra 9 to miami s renter population in 1980 i find that rents increased from 8 to 11 more in miami than in the comparison groups between 1979 and 1981 by 1983 the rent differential was still 7 rental units of higher quality were not affected by the immigration shock units occupied by low income hispanic residents in 1979 experienced an extra 8 differential hike with respect to other low income units relative housing prices moved in the opposite direction from rents in the short run

strategic pricing consumer search and the number of firms discover prices there are three distinct price dispersed equilibria characterized by low moderate and high search intensity the effects of an increase in the number of firms on search behaviour expected prices price dispersion and welfare are sensitive i to the equilibrium consumers search intensity and ii to the status quo number of firms for instance when consumers search with low intensity an increase in the number of firms reduces search does not affect expected price leads to greater price dispersion and reduces welfare in contrast when consumers search with high intensity increased competition results in more search and lower prices when the number of competitors in the market is low to begin with but in less search and higher prices when the number of competitors is large duopoly yields identical expected price and price dispersion but higher welfare than an infinite number of firms a question that has received much attention in economic theory is how the number of competitors and market outcomes are related despite the existence of work showing the contrary see e g satterthwaite 1979 rosenthal 1980 the prediction that emerges from a market where firms interact in a cournot fashion has come to dominate economic thought namely that an increase in the number of competitors leads to larger aggregate production lower market price and improved market performance measured in terms of some social welfare criterion ruffin 1971 this paper challenges the generality of this belief by presenting an oligopoly model with consumer search where the equilibrium expected price may be constant increasing or nonmonotonic in the number of firms we present an economy with two types of consumers consumers who search for prices at no cost fully informed and consumers who must pay a fixed search cost for each price quotation they observe less informed 1 all buyers have the same willingness to pay for the good and buy either a single unit or nothing at all on the supply side of the market there are n firms producing a homogeneous good at constant marginal cost we analyse a one shot simultaneous move game firms set prices and consumers decide how many prices to search for at the same moment in time our model is essentially an oligopolistic version of burdett and judd 1983 where some consumers search costlessly in this model consumers search using a fixed sample size search strategy i e they choose the number of prices to observe before receiving any offer nonsequential search is appealing when consumers find it more advantageous to gather price information quickly morgan and manning 1985 this occurs when the search outcome is observed with delay and delay is costly for instance an mba graduate looking for a job 1 the presence in the model of consumers who search costlessly captures the fact that some people have a

equilibrium price dispersion in retail markets for prescription drugs this study seeks to establish the empirical importance of price dispersion due to costly consumer search by examining retail prices for prescription drugs posted prices in two geographically distinct markets are shown to vary considerably across pharmacies within the same market even after one controls for variation due to pharmacy differences pharmacy heterogeneity accounts for at most one third of the observed price dispersion the empirical analysis hinges on the observation that consumers incentives to price shop depend on characteristics of the drug therapy cross sectional patterns in price distributions across drugs are consistent with the predictions of a search model prices for repeatedly purchased prescriptions for which the expected benefits of search are highest exhibit significant reductions in both dispersion and price cost margins

immigration and domestic wage an empirical study on competition among immigrants abstractwhile studies on the wage effects of immigration focus on native workers there is significantly less information on the wage effects of immigration on domestic foreign born workers in addition to analysing the impact of immigration on wages of native workers in this article we estimate the internal competition among foreign born workers in the united states firstly using data from the current population survey we find no empirical evidence supporting the substitutability of native workers for immigrants secondly there is no statistical difference between skilled and unskilled immigrants on the influence of the domestic labour market outcomes finally there is no internal competition among immigrants the income of non citizen workers mainly depends on state and national levels of economic situations not the number of non citizen workers available in the labour market

immigration and wages evidence from construction to identify relative wage impacts of immigration we make use of certification and licensing requirements in the norwegian construction sector that give rise to exogenous variation in immigrant employment shares across trades individual panel data reveal substantially lower wage growth for workers in trades with rising immigrant employment than for other workers selective attrition from the sector masks the causal wage impact unless accounted for by individual fixed effects for low and semi skilled workers effects of new immigration are comparable for natives and older immigrant cohorts consistent with perfect substitutability between native and immigrant labor within trade finally we present evidence that immigration reduces price inflation as price increases over the sample period were significantly lower in activities with growth in the immigrant share than in activities with no or small change in immigrant employment

searching for the effect of immigration on the labor market we compare two approaches to analyzing the effects of immigration on the labor market and find that the estimated effect of immigration on u s native labor outcomes depends critically on the empirical experiment used area analyses contrast the level or change in immigration by area with the level or change in the outcomes of non immigrant workers factor proportions analyses treat immigrants as a source of increased national supply of workers of the relevant skill the different effects of immigration on native outcomes in the area and factor proportions methodologies appear to result from the diluting effect of native migration flows across regions and failure to take adequate account of other regional labor market conditions in area comparisons excerpt

technology growth and expenditure growth in health care in the united states health care technology has contributed to rising survival rates yet health care spending relative to gdp has also grown more rapidly than in any other country we develop a model of patient demand and supplier behavior to explain these parallel trends in technology growth and cost growth we show that health care productivity depends on the heterogeneity of treatment effects across patients the shape of the health production function and the cost structure of procedures such as mris with high fixed costs and low marginal costs the model implies a typology of medical technology productivity i highly cost effective home run innovations with little chance of overuse such as anti retroviral therapy for hiv ii treatments highly effective for some but not for all e g stents and iii gray area treatments with uncertain clinical value such as icu days among chronically ill patients not surprisingly countries adopting category i and effective category ii treatments gain the greatest health improvements while countries adopting ineffective category ii and category iii treatments experience the most rapid cost growth ultimately economic and political resistance in the u s to ever rising tax rates will slow cost growth with uncertain effects on technology growth

theorizing path dependence a review of positive feedback mechanisms in technology markets regional clusters and organizations the concept of path dependence has often been criticized as vague and only narrowly applicable although we can find some very refined definitions of the concept we also find a wide range of empirical phenomena being described as path dependent we argue that more detailed accounts of the positive feedback mechanisms that form paths can take path dependence beyond this state of being overdetermined but under specified reviewing three well described cases of path dependent dynamics in technology markets regional clustering and organizations we define a core set of positive feedback mechanisms that constitute path dependence at different analysis levels and clarify the relationship between positive feedback and increasing returns we show that path dependent processes that is processes driven by positive feedback that veer toward rigidity or lock in can be but do not have to be found under many labels including structural inertia coevolution or institutional persistence we conclude that a precise definition of path dependence does not need to be at odds with the concept s widespread use in understanding organizational and industrial development processes copyright 2013 the author 2012 published by oxford university press on behalf of associazione icc all rights reserved oxford university press

the economics of immigration this literature review concerns the impact of immigration on the economy of the host country focusing on the experience of the united states the emphasis is on the period from the 1970s to the 1990s the author shows that research earlier in this period generally concluded that the economic effects of immigration were positive but that more recent research on later migrations have generally concluded that immigration may be having an adverse effect on the earnings of native unskilled workers and be placing an increased burden on welfare programs the importance of such economic analysis for the formulation of appropriate migration policies is stressed

the impact of 1970s repatriates from africa on the portuguese labor market this paper examines the labor market effect of the retornados who immigrated to portugal from angola and mozambique in the mid 1970s following portugal s loss of its african colonies the retornados increased the portuguese labor force by roughly 10 in just three years two analyses suggest contrasting conclusions first comparisons of portugal with spain and france indicate that any adverse effect of the retornados was quantitatively swamped by the europe wide downturn in labor market conditions in the 1970s second comparisons between districts within portugal indicate that the retornados may have had a strong adverse effect on portuguese wages suggesting that immigration may be considerably more harmful than previous case studies have concluded the authors however regard the results of the within portugal analysis as less reliable than those of the comparison across countries

cluster sample methods in applied econometrics inference methods that recognize the clustering of individual observations have been available for more than 25 years brent moulton 1990 caught the attention of economists when he demonstrated the serious biases that can result in estimating the effects of aggregate explanatory variables on individual specific response variables the source of the downward bias in the usual ordinary least squares ols standard errors is the presence of an unobserved state level effect in the error term more recently john pepper 2002 showed how accounting for multi level clustering can have dramatic effects on t statistics while adjusting for clustering is much more common than it was 10 years ago inference methods robust to cluster correlation are not used routinely across all relevant settings in this paper i provide an overview of applications of cluster sample methods both to cluster samples and to panel data sets

immigration and wages evidence from the 1980s this paper presents new evidence on the effects of immigration based on changes in the distributions of wages in 24 major u s cities during the 1980s we concentrate on measuring the effects of immigration at the lower tail of the wage distribution in particular we ask whether recent declines in the real earnings of the least skilled workers in the u s economy are related to immigration our empirical analysis reveals large differences across cities in the relative growth rates of wages for low and high paid workers nevertheless these differences bear little or no relation to the size of immigrant inflows excerpt

changing sources of competitive advantage cognition and path dependence in the finnish retail industry 1945 1995 in this study we analyze the finnish retail industry in 1945 1995 triangulating the major developments in society technology and firm level strategic choices we identified extensive variation in the sources of competitive advantage over time we found that the structural and cognitive cultural dimensions of firms that offered opportunities for success in some specific historical situations turned to be disadvantageous in other situations we propose a research framework that parcels managerial cognition into the elements of structure ideology and systemic and technical properties of the firm especially the notion of ideology is novel in the context of path dependence and cognition copyright 2006 oxford university press

networks and innovation in a modular system lessons from the microcomputer and stereo component industries in this paper we examine theoretically and through case studies the phenomenon of the modular system which we distinguish from a product conceived of as a prepackaged entity or appliance we argue that such systems offer benefits on both the demand side and the supply side supply side benefits include the potential for autonomous innovation which is driven by the division of labor and provides the opportunity for rapid trial and error learning demand side benefits include the ability to fine tune the product to consumer needs and therefore blanket the product space more completely both of our case studies suggest that innovation in a modular system can lead to vertical and horizontal disintegration as firms can often best appropriate the rents of innovation by opening their technology to an outside network of competing and cooperating firms we conclude by speculating on the increased importance of modular systems in the future since flexible manufacturing and rising incomes are likely to increase the driving requisites of modular systems low economies of scale in assembly and sophisticated consumer tastes

productivity growth persistence firm strategies size and system properties this paper investigates the dynamics of productivity in a large sample of italian manufacturing firms focusing on the determinants of firm level persistence in time of high total factor productivity tfp growth rates relative to the corresponding sectoral distributions in particular we assess the impact of both the internal characteristics of companies including size and management strategies and external systemic conditions including business cycles and regional innovation performance in order to disentangle the effects of the mix of internal and systemic factors in shaping firm level persistence we implement both transition probability matrices and dynamic probit models results reveal the presence of significant persistence in tfp growth rates such persistence turns out to be path dependent since it is shaped by a number of complementary and contingent factors that locally affect the dynamics of the process

networks in the modern economy mexican migrants in the u s labor market this paper attempts to identify job networks among mexican migrants in the u s labor market the empirical analysis uses data on migration patterns and labor market outcomes based on a sample of individuals belonging to multiple origin communities in mexico over a long period of time each community s network is measured by the proportion of the sampled individuals who are located at the destination the united states in any year we verify that the same individual is more likely to be employed and to hold a higher paying nonagricultural job when his network is exogenously larger by including individual fixed effects in the employment and occupation regressions and by using rainfall in the origin community as an instrument for the size of the network at the destination

technology entrepreneurship and path dependence industrial clustering in silicon valley and route 128 silicon valley and route 128 have been the centers of innovation and commercialization for the electronics computer and data communications industries in the postwar period however since the 1960s silicon valley has grown more rapidly and from approximately 1985 through 1995 route 128 experienced retarded growth their success had diverged dramatically in the last decade the most common explanations for this divergence are differing cultures interfirm relations or and internal organizational style organization this paper builds upon path dependent and dominant design explanations of technical and industrial change arguing that the technological trajectories of the industries underlying the two regions were different and this led to their differential destinies to explain the dynamics of the two regions and analytical separation is made between the economy of the existing firms and a separate economy of institutions that evolved to nurture new firm formation copyright 1999 by oxford university press

the impact of immigration on the labor market the literature on the impact of immigration on the labor market is highly controversial the aim of this paper is to review the existing literature and draw some general conclusions on how wages and employment respond to immigration economic studies indicate that the impact of immigration on the average wage and employment of native workers is null or slightly positive however because adjustments take time the immediate labor market effects of unexpected as opposed to expected migration episodes can be detrimental immigration also can have distributional consequences in particular the skill composition of immigrants matters in determining their impact on native labor market outcomes an inflow of immigrants will tend to reduce the wages of competing native workers with skills similar to those of the migrants and increase those of complementary workers with skills that complement those of immigrants by affecting the skill composition of the workforce immigration can create winners and losers among native workers via changes in the wage structure

the labour market impact of immigration in the first part of this paper we present a stylized model of the labour market impact of immigra tion we then discuss mechanisms through which an economy can adjust to immigration changes in factor prices output mix and production technology in the second part we explain the problems of empirically estimating how immigration affects labour market outcomes of the resident population and review some strategies to address these we then summarize some recent empirical studies for the uk and other countries we conclude with an outlook on what we believe are important avenues for future research