is firm specific innovation associated with greater value appropriation the roles of environmental dynamism and technological diversity abstract this paper extends the resource based theory of the firm to examine the contingencies that either intensify or reduce the relationship between firm specific innovation and value appropriation based on a large scale analysis of a sample of us manufacturing firms we found that greater innovation rents appropriation is associated with an increase in firm specificity of its innovative knowledge but the positive relationship between firm specific innovations and firm value appropriation tends to decrease when the product or technology market is highly dynamic further under high environmental dynamism firms should increase the diversity in their knowledge composition in order to mitigate the risk of value erosion associated with firm specific innovations

economic policy and equality of opportunity we employ eop definitions that have appeared in the philosophical literature on distributive justice and apply it to a formal economic model which incorporates human capital investment and luck within and across generations the human capital acquisition technology features multiple stages of parental investments during childhood and on the job investments in adulthood the benchmark model features an intergenerational borrowing constraint education and low income subsidies which are financed by a progressive income tax the model is calibrated to the u s in 1990 on which we operationalize philosophical concepts by using the children s continuation values as outcomes and the state space of the recursive decision problem as circumstances this reveals that intergenerational investments should be accounted for when comparing measures of eop when conditioning on parental luck instead of outcomes eop looks much larger luck is overwhelmed by human capital accumulation in contrast when looking at children s net wealth instead of lifetime earnings eop looks worse intergenerational borrowing constraints are more pronounced in wealth than in earnings in counterfactual experiments we find that education subsidies increase utilitarian welfare and decrease overall inequality but does little to promote eop this is for two reasons when one takes the view that intergenerational efforts should be rewarded there is little room for improvement in eop to begin with on the other hand when one takes the view that intergenerational efforts should not be rewarded much stronger redistribution is needed for the policies to have a quantitative impact

fertility social mobility and long run inequality dynastic altruistic models with endogenous fertility have been shown to be unable to generate enough intergenerational persistence using a bewley model with endogenous fertility we show that it is possible to recover persistence key ingredients for our result include exponential child discounting discrete number of children diminishing costs of child rearing and an elasticity of intergenerational substitution larger than one our model provides a unified framework of analysis for long run inequality that incorporates fertility choices

wealth distribution in life cycle economies abstract this paper compares the age wealth distribution produced in life cycle economies to the corresponding distribution in the us economy the idea is to calibrate the model economies to match features of the us earnings distribution and then examine the wealth distribution implications of the model economies the findings are that the calibrated model economies with earnings and lifetime uncertainty can replicate measures of both aggregate wealth and transfer wealth in the us furthermore the model economies produce the us wealth gini and a significant fraction of the wealth inequality within age groups however the model economies produce less than half the fraction of wealth held by the top 1 percent of us households

information technology effects on firm performance as measured by tobin s q despite increasing anecdotal evidence that information technology it assets contribute to firm performance and future growth potential of firms the empirical results relating it investments to firm performance measures have been equivocal however the bulk of the studies have relied exclusively on accounting based measures of firm performance which largely tend to ignore it s contribution to performance dimensions such as strategic flexibility and intangible value in this paper we use tobin s q a financial market based measure of firm performance and examine the association between it investments and firm q values after controlling for a variety of industry factors and firm specific variables the results based on data from 1988 1993 indicate that in all of the five years the inclusion of the it expenditure variable in the model increased the variance explained in q significantly the results also showed that for all five years it investments had a significantly positive association with tobin s q value our results are consistent with the notion that it contributes to a firm s future performance potential which a forward looking measure such as the q is better able to capture

administrative cooperation and disease control in cross border pork production abstract in recent years the continuous structural change in the value chain of modern food production has been characterised by an increasing international division of labour among manufacturing companies a regional specialisation of primary agricultural production is especially apparent in meat production thus the german dutch border area has developed into a region of unprecedented intensive pork production while the netherlands specialises in piglet production the production of fattened pigs continues to grow in northwest germany as a result of this increasing transnational value chain development german imports of dutch piglets have risen continuously since 2000 however this structural interweaving of pork production between the netherlands and germany has resulted in many new challenges for the cooperation between the various participants and in particular for the administrative authorities in the field of food and feed safety as well as efficient animal disease control the motivation for this exploratory study stems from the lack of scientific work on this topic to date the aim of this research is to illustrate the relevance of functioning cross border cooperation in the food sector using commodity flow structures and disease spread analysis results indicate that cross border cooperation between authorities during a csf epidemic can reduce the risk of recurrence and the duration by 50

on the distribution and dynamics of health care costs using data from the health and retirement survey and the assets and health dynamics of the oldest old survey we estimate the stochastic process that determines both the distribution and dynamics of health care costs we find that the data generating process for log health costs is well represented as the sum of a white noise process and a highly persistent ar 1 process we also find that the innovations to this process can be modelled with a normal distribution that has been adjusted to capture the risk of catastrophic health care costs simulating this model we find that in any given year 0 1 of households receive a health cost shock with a present value of at least 125 000 copyright 2004 john wiley sons ltd

wealth distribution with random discount factors abstract to explain the pareto tail behavior empirically observed in wealth distributions the quantitative macro literature has occasionally assumed that agents have random discount factors this paper formally proves that the stationary wealth distribution in a simple huggett model with random discounting has power law tails and characterizes the pareto exponents analytically i find that in general there is no clear relationship between the return on wealth and inequality and that the pareto exponent is highly sensitive to the persistence of the discount factor process i also provide a practical guidance for how to characterize the pareto exponents in richer models

comment sequential moment restrictions in panel data 1992 comment sequential moment restrictions in panel data journal of business economic statistics vol 10 no 1 pp 20 26

on the intergenerational transmission of economic status we present a model in which human capital investments occur over the life cycle and across generations a la becker and tomes the human capital technology features multiple stages of childhood investments college and life cycle accumulation the model can explain a wide range of intergenerational relationships while remaining empirically consistent with cross sectional inequality much of the latter is determined by early investments in children so that borrowing constraints faced by young parents are important for understanding the persistence of economic status across generations education subsidies especially early on can significantly reduce the intergenerational persistence of economic status

how do policies for efficient energy use in the household sector induce energy efficiency innovation an evaluation of european countries abstract research on innovation induced by climate mitigation policy has been focused predominantly on the supply side of the energy system despite considerable climate mitigation potential on the demand side less attention is given to the innovation effect of policies addressing the household sector based on a comprehensive data set including 550 policy measures over 30 years 1980 2009 and covering 21 european countries we find based on econometric estimations that policies targeting efficient energy use in the household sector significantly increase the number of patented energy efficiency inventions a comparison of the different policy types reveals a particularly strong influence from financial subsidies and energy labels the results indicate that policies supporting early market adoption of energy efficient technologies are effective in fostering innovation

family firms and r d behavior new evidence from a large scale survey abstract this paper analyzes how founders and their families influence r d intensity information on r d comes from a large scale bi annual survey among listed german firms we find that r d intensity is higher in firms that are actively managed by the family the impact of family control via voting rights is negative but mostly not significant while this negative family control effect is in line with hitherto existing literature the positive impact of family management is surprising indeed this positive effect disappears if we follow previous research and use r d information from financial statements we show that this puzzling result is related to corporate opacity opaque family managed firms report too conservative r d expenditures especially if they face financial constraints this leads to an under estimation of r d intensity in these firms if accounting figures are used

uncertain medical expenses and precautionary saving near the end of the life cycle this paper introduces a dynamic structural model of household consumption decisions in which elderly families consider the effects of uncertain future medical expenses when deciding current levels of consumption the model with uncertain medical expenses implies a potentially important role for precautionary saving incentives to explain slow rates of dissaving among elderly americans during retirement rather than just simulating the stochastic dynamic model preference parameters are estimated using panel data on health wealth and expenditures for retired families the health uncertainty model predicts consumption levels closer to observed expenditures than a life cycle model with uncertain longevity however elderly families typically dissave their financial assets more slowly than even the baseline health uncertainty model predicts is optimal

the relative effectiveness of patents and secrecy for appropriation abstract changes in patent law global competition and the rise of several new technologies suggest that patents could be of greater value than secrecy for many innovative firms particularly small firms that are unable to use market power or other factors to appropriate their investments in innovation data from the 1993 european community innovation survey cis for up to 2849 r d performing firms is analysed to determine the relative importance of secrecy vs patents this particular combination of appropriation methods is interesting because secrecy can act as a mutually exclusive alternative to patents the results show that a higher percentage of firms in all size classes rate secrecy as more valuable than patents however ordered logit regressions show that the probability that a firm rates secrecy as more valuable than patents declines with an increase in firm size for product innovations while there is no relationship for process innovations the firm s r d intensity has no effect on the relative value of secrecy vs patents there is weak evidence to show that participation in cooperative r d increases the value of patents over secrecy for product innovations the results are relevant to ongoing debates over changes to the patent system and the need for policies to encourage small firms to patent more

health care reform or more affordable health care this article investigates the impact on the u s economy of making health care more affordable we compare health care cost reductions with the patient protection and affordable care act aca using a rich life cycle general equilibrium model with heterogeneous agents we evaluate a wide range of cost reductions ranging from 0 64 realistic and feasible to 29 5 equivalence with oecd our results show that the aca is more effective in reducing uninsured population than all cost reductions considered this result holds throughout the life cycle and for the most fragile part of the population the poorest the less educated and those with bad health realistic and feasible cost reductions are less welfare improving than the aca the increase of welfare induced by the reform is around 7 8 times higher than the increase provided by cost reductions besides the poorer are more benefited than the richer after the reform while the opposite occurs after cost reductions finally to obtain the same welfare increase of the aca medical costs have to decrease by 5 21 a very hard task these results provide support for the aca against opponents who might present cost reductions as alternatives

accounting for the u s earnings and wealth inequality we show that a theory of earnings and wealth inequality based on the optimal choices of ex ante identical households that face uninsured idiosyncratic shocks to their endowments of efficiency labor units accounts for the u s earnings and wealth inequality almost exactly

new evidence on sex segregation and sex differences in wages from matched employee employer data we use new matched employer employee data to estimate the contributions of sex segregation and wage differences by sex within occupation industry establishment and occupation establishment cells to the overall sex gap in wages in contrast to earlier data used to study this question our data cover all industries and occupations across all regions of the united states we find that segregation of women into lower paying occupations industries establishments and occupations within establishments accounts for a sizable fraction of the sex gap in wages nonetheless approximately one half of the sex gap in wages remains attributable to the individual s sex

on the trade off between the future benefits and riskiness of r d a bondholders perspective abstract existing studies on the value relevance of r d tend to overstate the r d benefits and shed little light on the trade off between the r d benefits mean effect and their riskiness variance effect this study shows that the variance effect of r d is on average more significant than their mean effect in bond valuation hence for creditors the r d risk dominates their benefits furthermore this study documents that r d measures alone explain approximately 80 of cross sectional variations in bond ratings and risk premium these findings contribute to the debate over r d accounting and the bond pricing literature

determinants of cross national knowledge transfer and its effect on firm innovation this study examines the determinants of international knowledge flow from a resource based perspective it evaluates the impact of cross national knowledge transfer on firm innovative performance based on 56 027 us patents owned by 53 selected firms in the us based pharmaceutical industry the results suggest that innovative performance is a curvilinear function of the international knowledge content used by a firm to innovate as hypothesized it was found that at 1 low and moderate levels of international knowledge content a firm s strategy to transfer international knowledge improves its innovative performance and at 2 higher levels of international knowledge content there are diminishing marginal returns to transferring knowledge from overseas

patents and the survival of internet related ipos abstract we examine the effect of patenting on the survival prospects of 356 internet related firms that made an initial public offering on the nasdaq at the height of the stock market bubble of the late 1990s by march 2005 almost 2 3 of these firms had delisted from the exchange changes in the legal environment in the us in the 1990s made it much easier to obtain patents on software and ultimately on business methods though less than 1 2 of the firms in our sample obtained or attempted to obtain patents for those that did we hypothesize that patents conferred competitive advantages that translate into higher probability of survival though they may also simply be a signal of firm quality controlling for other determinants of firm survival patenting is positively associated with survival quite different processes appear to govern exit via acquisition compared to exit via delisting from the exchange due to business failure firms that applied for more patents were less likely to be acquired though if they obtain unusually highly cited patents they may be a more attractive acquisition target these findings do generally not hold true for business method patents which do not appear to confer a survival advantage

entry and patenting in the software industry to what extent are firms kept out of a market by patents covering related technologies do patents held by potential entrants make it easier to enter markets we estimate the empirical relationship between market entry and patents for 27 narrowly defined categories of software products during the period 1990 2004 controlling for demand market structure average patent quality and other factors we find that a 10 increase in the number of patents relevant to market reduces the rate of entry by 3 8 and this relationship intensified following expansions in the patentability of software in the mid 1990s however potential entrants with patent applications relevant to a market are more likely to enter it finally patents appear to substitute for complementary assets in the entry process because patents have both greater entry deterring and entry promoting effects for firms without prior experience in other markets this paper was accepted by bruno cassiman business strategy

intellectual capital in a q theory of ag biotech mergers tobin s q theory of investment has been linked to firm merger activity by jovanovic and rousseau jr they showed that firms with higher q values that is the ratio of market to book values tend to be the ones buying other firms and not the ones being acquired market values should theoretically equal book values a firm s assets as they appear on the balance sheet equal to their cost less accumulated depreciation in reality book value often differs from market value especially in knowledge intensive industries indicating the premium above measurable assets that shareholders are willing to pay for a company s unique combination of market position tangible and intangible capital goodwill and other favorable characteristics firms with greater q values are in a position to acquire more capital possibly through mergers and acquisitions to make further use of their advantages this article extends the jr analysis to consider the role of intellectual capital in merger activity we analyze the connection between intangible capital and the q theory of mergers in the agricultural biotechnology ag biotech industry this industry underwent significant technological change beginning in the late 1980s as new biotechnology techniques were integrated with plant breeding and other agricultural practices the number of patent applications in the field grew from less than a 100 a year in the late 1980s to more than 500 applications per year by the mid 1990s bennett et al along with this technological change

new theories of trade among industrial countries most students of international trade have long had at least a sneaking suspicion that conventional models of comparative advantage do not give an adequate account of world trade this is especially true of trade in manufactured goods both at the macro level of aggregate trade flows and at the micro level of market structure and technology it is hard to reconcile what we see in manufactures trade with the assumptions of standard trade theory in particular much of the world s trade in manufactures is trade between industrial countries with similar relative factor endowments furthermore much of the trade between these countries involves two way exchanges of goods produced with similar factor proportions where is the source of comparative advantage furthermore most manufacturing industries are characterized by at least some degree of increasing returns especially if we include dynamic scale economies associated with rd the arguments of many observers that much trade among industrial countries is based on scale economies rather than comparative advantage and the common argument that a protected home market can promote exports until recently however none of these alternatives was presented in a form which economists would properly call a model that is a formal structure in which macro behavior is derived from micro motives this lack of formalization essentially barred alternatives to comparative advantage however plausible from the mainstream of international economics in the last five years or so however there has been a significant change a number of theorists have begun to apply methods drawn from the theory of industrial organization to international trade to produce a new genre of trade models these models offer a new way of looking at tradeand particularly at manufactures trade among the industrial countries a characteristic feature of the new models is that they often rely on very special assumptions this is probably inevitable given the inherent complexity of the world once the great simplifying device of constant returns is dropped only special assumptions will yield tractable analysis in spite of the specialness of individual models however the new literature on trade is starting to give rise to concepts which look more general than the particular models used to illustrate them the purpose of this paper is to sketch out two such concepts which i believe are important and more general in application than the particular models in which they have been expressed the first is the theory of intraindustry trade a view which incorporates scale economies as well as comparative advantage as major causes of trade and gains from trade the second is the less well developed theory of technological competition which may begin to shed some light on the dynamics of international competition in research intensive industries

are americans saving optimally for retirement we solve each household s optimal saving decisions using a life cycle model that incorporates uncertain lifetimes uninsurable earnings and medical expenses progressive taxation government transfers and pension and social security benefits with optimal decision rules we compare household by household wealth predictions from the life cycle model using a nationally representative sample we find making use of household specific earnings histories that the model accounts for more than 80 percent of the 1992 cross sectional variation in wealth fewer than 20 percent of households have less wealth than their optimal targets and the wealth deficit of those who are undersaving is generally small

how do patent laws influence innovation evidence from nineteenth century world fairs studies of innovation have focused on the effects of patent laws on the number of innovations but have ignored effects on the direction of technological change this paper introduces a new dataset of close to fifteen thousand innovations at the crystal palace world s fair in 1851 and at the centennial exhibition in 1876 to examine the effects of patent laws on the direction of innovation the paper tests the following argument if innovative activity is motivated by expected profits and if the effectiveness of patent protection varies across industries then innovation in countries without patent laws should focus on industries where alternative mechanisms to protect intellectual property are effective analyses of exhibition data for 12 countries in 1851 and 10 countries in 1876 indicate that inventors in countries without patent laws focused on a small set of industries where patents were less important while innovation in countries with patent laws appears to be much more diversified these findings suggest that patents help to determine the direction of technical change and that the adoption of patent laws in countries without such laws may alter existing patterns of comparative advantage across countries jel d2 k11 l51 no 014

improving patent valuations for management purposes validating new indicators by analyzing application rationales abstract this paper analyzes the validity of so far untested indicators of patent value to enhance the quality of patent assessments using indicators at the corporate level the article expands the theory by eliciting patent attorneys filing rationales to maximize profits from protecting intellectual property to inspire the computation of new value indicators including patent full texts then based on a newly compiled data set consisting of 813 ep patents the probability of an opposition against a patent is modeled by established and new value indicators the results show that accelerated examination requests and qualified word counts enhance the quality of existing valuation methods

value implications of investments in information technology the year 2000 y2k countdown provided a uniquely visible instance of spending on information technology it by u s companies with public attention riveted on potential y2k malfunctions managers were forced to evaluate their it and make decisions about whether to modify or replace existing systems in the aftermath of y2k critics charged that the problem was overblown and that companies overspent on it in contrast we posit in this paper that efforts companies made to renew and upgrade their it may have positioned them to take advantage of new e business applications as y2k approached managers could invest opportunistically in it which would enable them to connect with customers and suppliers in new ways contrary to the alleged overspending we find that firm value increased on average with y2k spending by fortune 1000 companies in particular higher firm value and subsequent earnings were associated with y2k spending for firms in industries where it was considered to have a transforming influence altering traditional ways of doing business by redefining business processes and relationships we also test whether the positive association between firm value and y2k spending diminished with y2k spending by industry peer firms but we do not find support for this relative investment hypothesis

the impact of environmentally friendly innovations on value added while recent literature has focused on explaining the determinants of green innovations it is not well understood how such innovations affect performance to analyse the relationship between green innovation and performance new industry level panel data were exploited these include 12 oecd countries the whole manufacturing sector and a period of 30 years the results show that green inventions are u shape related to performance however the turning point is quite high and hence only relevant for a few industries this indicates that given the current level of green promotion market incentives alone are not sufficient to allow the green invention activities of industries to rise considerably to verify these results and to get a better understanding of the mechanisms in the green market we finally made several interviews with multinational firms that have a good understanding of what happens on the global market of green innovation

understanding why high income households save more than low income households abstract we use a calibrated life cycle model to evaluate why high income households save as a group a much higher fraction of income than do low income households in us cross section data we find that 1 age and relatively permanent earnings differences across households together with the structure of the us social security system are sufficient to replicate this fact 2 without social security the model economies still produce large differences in saving rates across income groups and 3 purely temporary earnings shocks of the magnitude estimated in us data alter only slightly the saving rates of high and low income households

industry effects and appropriability measures in the stock market s valuation of r d and patents this paper examines the stock market s valuation of a firm s innovative activity we estimate the market s relative valuation of firms tangible and intangible assets focusing on knowledge capital in the form of accumulated stocks of r d and patents we tried to improve upon our estimates of the stock market s valuation of knowledge capital embodied in such stocks by bringing in measures of the appropriability environment facing a firm from the yale survey on industrial research and development the responses to survey questions about the effectiveness of patents as a mechanism for protecting the returns from innovation turn out to be of some use there is evidence of an interaction between industry level measures of the effectiveness of patents and the market s valuation of a firm s past r d and patenting performance as well as its current r d moves we find no evidence however that other appropriability mechanisms differ enough across industries to leave measurable traces in our data the structure of the yale survey makes it possible to estimate the sampling error in the appropriability measures derived from it this information was used by us in an errors in variables context but with little success in the absence of r d variables our estimates imply that a two standard deviation increase in our index of patent effectiveness would raise the value of a patent held by our average firm from 0 4 million to 1 0 million when r d variables are introduced into the equations the patents variables become insignificant r d expenditures are a better measure of input to the innovative function of firms than patents are of its output but we estimate that the same experiment would induce changes in q of between 10 and 27 percent for the average firm approximately doubling the market s valuation of this kind of capital this abstract was borrowed from another version of this item

income and wealth heterogeneity in the macroeconomy how do movements in the distribution of income and wealth affect the macroeconomy we analyze this question using a calibrated version of the stochastic growth model with partially uninsurable idiosyncratic risk and movements in aggregate productivity our main finding is that in the stationary stochastic equilibrium the behavior of the macroeconomic aggregates can be almost perfectly described using only the mean of the wealth distribution this result is robust to substantial changes in both parameter values and model specification our benchmark model whose only difference from the representative agent framework is the existence of uninsurable idiosyncratic risk displays far less cross sectional dispersion and skewness in wealth than u s data however an extension that relies on a small amount of heterogeneity in thrift does succeed in replicating the key features of the wealth data furthermore this extension features aggregate time series that depart significantly from permanent income behavior

simulating the transmission of wealth inequality via bequests abstract this paper develops calibrates and simulates a dynamic 88 period olg model to study the intergenerational transmission of u s wealth inequality via bequests the model features marriage realistic fertility patterns random death assortative mating based on skills heterogeneous skill endowments heterogeneous rates of return skill inheritability progressive income taxation and resource annuitization via social security all bequests arise from imperfect annuitization nonetheless the model generates a realistic ratio of aggregate wealth to aggregate labor income a realistic bequest flow relative to the stock of wealth and a realistic wealth distribution at retirement skill differences assortative mating social security and the time preference are the primary determinants of wealth inequality bequests do propagate wealth inequality but only in the presence of social security which disproportionately disinherits the lifetime poor intergenerational wealth immobility also considered here is primarily determined by the inheritance of skills from one s parents and the magnification of the impact of this inheritance by marital sorting

post entry competition in the plain paper copier market this paper reviews events in the plain paper copier ppc market immediately after xerox s monopoly ended xerox s behavior and that of a flood of ppc entrants are viewed through the lens of recent advances in the theory of entry and entry deterrence the events of the early post entry period also cast some interesting light on the theory of technological competition the modern theory of entry deterrence rests on a simple if not obvious proposition the socially worst industry performance is after entry the more monopolies there will be since the interests of the entrant and society are opposed once entry has occurred a series of papers have considered endogenous changes in the conditions of competition monopolists who make their industry more competitive conditional on entry in order to deter potential entrants there are two distinct steps in the entry deterrence argument first it must be possible for events during the monopoly period to affect postentry competition some intertemporal complication must be present either in costs or in firm specific demand if the state of the industry at the time of entry is to form important initial conditions for competition second the monopolist must find it profitable to manipulate the initial conditions by some pre entry action the general theoretical questions of entry and deterrence have been cast in quite specific terms for the problem of technological competition one view emphasizes the arrow effect kenneth arrow 1962 jennifer reinganum 1983 drew fudenberg and jean tirole because any innovation destroys some of the rents to older products and processes incumbent monopolists have a smaller incentive to innovate than potential entrants another view richard schmalensee 1983 richard gilbert and david newbery 1982 points out that the incumbent s losses from entrant s innovation create a motive for preemptive r d product introduction or patenting if incumbents are leaders and entrants followers the second view will hold independent of technology note that the difference is over the profitability of entry deterring strategies in both views the presence of valuable assets like patents or secrets provides the necessary intertemporal link events in the ppc market during the time of xerox s monopoly did have a substantial impact on the nature of competition in the early postentry period an arrow effect is evident as are other equilibrium explanations of xerox s rapid decline the alternative explanation that xerox was fat is also considered below

technological diversity uncertainty and innovation performance abstractwe analyse the impact of technological diversity on innovation performance in the discovery stage measured by r d intensity and patent applications and in the commercialization stage mea

why do industries coagglomerate how marshallian externalities differ by industry and have evolved over time abstract the fact that firms benefit from close proximity to other firms with which they can exchange inputs skilled labor or know how helps explain why many industrial clusters are so successful studying the evolution of coagglomeration patterns we show that the type of agglomeration that benefits firms has drastically changed over the course of a century and differs markedly across industries whereas at the beginning of the twentieth century industries tended to colocate with their value chain partners in more recent decades the importance of this channel has declined and colocation seems to be driven more by similarities in industries skill requirements by calculating industry specific marshallian agglomeration forces we are able to show that today skill sharing is the most salient motive behind the location choices of services whereas value chain linkages still explain much of the colocation patterns in manufacturing moreover the estimated degrees to which labor and input output linkages are reflected in an industry s coagglomeration patterns help improve predictions of city industry employment growth

companies learning to innovate in recessions abstract innovating in downturns can affect corporate success by improving a firm s position relative to competitors during the recovery period however increased uncertainty and more binding financial constraints complicate such innovation activity i find that past experience with innovation during recessions improves a firm s ability to invest in r d when a new downturn hits this result holds controlling for traditional drivers of innovation as cumulated innovations and financial constraints as well as mitigating endogeneity and selection concerns moreover i find that past experience with innovation during recessions is beneficial to patent outcomes after a new recession overall the paper provides novel evidence on how business cycles shape innovative capabilities

the dynamics of innovative activity and competitive advantage the case of australian retail banking 1981 to 1995 this study examines the adoption of new products and processes in the australian retail banking industry over the 1981 to 1995 period our analysis demonstrates that the vast majority of observed innovative activity was based on ideas sourced from outside the focal firm and that innovations diffused very quickly across competing banks as such there were no periods during which any bank had proprietary possession of a major product or process innovation we therefore ask how the banks innovative activity could affect their relative financial performance positions we answer this question by developing a set of hypotheses that relate specific features of their histories of innovative activity to their current financial performance these hypotheses are tested using a detailed data set describing 1 297 modifications made to products and services distribution technologies and back office processes within a sample of australian retail banks over the sample period our results provide support for the general position that establishing an attractive competitive position depends on the specific history of a firm s innovative activity banks that undertook more innovative activity that were more consistent in that activity and whose composition of activity was somewhat differentiated from the industry norm tended to display superior financial performance rather than looking solely for internally generated inimitable innovations to deliver competitive advantage these results suggest that active and consistent innovative activity that is somewhat differentiated from competitors can also deliver superior financial performance

retirement wealth and lifetime earnings this article argues that a satisfactory theory of wealth inequality should account not only for the marginal distribution of wealth but also for the joint distribution of wealth and earnings the article describes the joint distribution of retirement wealth and lifetime earnings in the panel study of income dynamics it then evaluates the ability of a stochastic life cycle model to account for key features of this distribution the life cycle model fails to account for three key features of the data 1 the correlation between lifetime earnings and retirement wealth is too high 2 the wealth gaps between earnings rich and earnings poor households are too large 3 wealth inequality among households with similar lifetime earnings is too small models in which households differ in rates of return or time preferences account much better for the joint distribution of retirement wealth and lifetime earnings

imitation costs and patents an empirical study it has long been recognised that the costs of imitating new products have an important effect on the incentives for innovation in a market economy as arrow i962 and others have pointed out if firms can imitate an innovation at a cost that is substantially below the cost to the innovator of developing the innovation there may be little or no incentive for the innovator to carry out the innovation in their discussions of the innovation process economists frequently have called attention to the major role played by the costs of imitation but there has been little or no attempt to measure these costs to test various hypotheses concerning the factors influencing them or to estimate their effects in this paper we report some findings of what seems to be the first study of this topic in addition we present data regarding the effects of patents on imitation costs and on the rate of innovation

patenting by manufacturing firms in india its production and impact this paper attempts to simultaneously study the production and impact of patenting in a less developed country using panel firm level data for the period 1975 79 for india the authors results suggest that despite the limited protection of intellectual property rights in india patenting is associated with a significant increase in total factor productivity growth at the firm level after controlling for unobserved fixed firm effects r d manpower appears to be the only input that significantly influences the probability of patenting copyright 1989 by blackwell publishing ltd

the value of intellectual property rights to firms and society economists view intellectual property rights iprs as policy tools for encouraging innovation but they recognize that they can also inhibit competition there are many types of iprs and institutions concerned with their administration we begin by outlining how these complex and varied rights are supposed to work and how they interact with other characteristics of firms and markets we then survey the available literature on patents trade marks and copyright to assess the value of these iprs to firms and the costs to firms of acquiring and defending their rights the paper concludes with suggestions for topics requiring further research to inform public policy better

dynamic status effects savings and income inequality this paper advances the hypothesis that the intensity of status preferences depends negatively on the average wealth of society endogenous dynamic status effect in accordance with empirical evidence our theory replicates the contradictory historical facts of an increasing saving rate along with declining returns to capital over time by affecting the dynamics of the saving rate the dynamic status effect raises inequality thereby providing a behavioural mechanism for the observed diverse dynamics of income inequality across countries in countries in which the dynamic status effect is strong weak inequality rises declines over time in response to a positive productivity shock

older or wealthier the impact of age adjustment on wealth inequality differences in individual wealth holdings are widely viewed as a driving force of economic inequality however as this finding relies on cross sectional data a concern is that older is confused with wealthier we propose a new method to adjust for age effects in cross sections which eliminates wealth inequality due to age yet preserves inequality arising from other factors using a new cross country comparable database we examine the impact of age adjustments on wealth inequality across countries and over time we find that the most widely used method yields a substantially different picture of age adjusted wealth inequality than our method 2011 the editors of the scandinavian journal of economics

in search of complementarity in innovation strategy internal r d and external knowledge acquisition empirical research on complementarity between organizational design decisions has traditionally focused on the question of existence of complementarity in this paper we take a broader approach to the issue combining a productivity and an adoption approach while including a search for contextual variables in the firms strategy that affects complementarity analysis of contextual variables is not only interesting per se but also improves the productivity test for the existence of complementarity we use our empirical methodology to analyze complementarity between innovation activities internal research and development r d and external knowledge acquisition our results suggest that internal r d and external knowledge acquisition are complementary innovation activities but that the degree of complementarity is sensitive to other elements of the firms strategic environment we identify reliance on basic r dthe importance of universities and research centers as an information source for the innovation processas an important contextual variable affecting complementarity between internal and external innovation activities

what accounts for the variation in retirement wealth among u s households even among households with similar socioeconomic characteristics saving and wealth vary considerably life cycle models attribute this variation to differences in time preference rates risk tolerance exposure to uncertainty relative tastes for work and leisure at advanced ages and income replacement rates these factors have testable implications concerning the relation between accumulated wealth and the shape of the consumption profile using the panel study of income dynamics and the consumer expenditure survey we find little support for these implications the data are instead consistent with rule of thumb mental accounting or hyperbolic discounting theories of wealth accumulation jel di d91 e21

families as shocks in this paper we show the quantitative importance of the process that determines changes in family composition to determine the main macroeconomic magnitudes we do so by modelling family type as a stochastic process that affects households in a way similar to shocks to earnings agents respond to these process by optimally choosing savings we show that the size of savings differs dramatically depending on the details of the stochastic process the model is quantitative its fundamental parameters are estimated using u s data

discount rate heterogeneity and social security reform abstract as many countries consider the privatization of existing pay as you go social security systems the option to make participation in the new system voluntary may appeal to policy makers who need to obtain the political support of their workers a critical issue in evaluating such a reform and its economic consequences is the unobserved heterogeneity in households preferences for consumption this paper estimates the distribution of rates of time preference from the wealth data in the survey of consumer finances 1992 and a flexible life cycle model of consumption under income uncertainty the estimated distribution is then applied to a variety of reform proposals that incorporate a voluntary choice of how much to contribute to a dedicated retirement account and a rebate of the existing payroll tax that increases with the magnitude of the contribution the main finding is that an appropriate menu of reform plans can induce the voluntary buy out of 84 of existing payroll taxes at an immediate cost to national saving of less than 0 25 percentage point

dynamic competition in technological investments an empirical examination of the lcd panel industry abstract when are technological laggards more likely to try to catch up with leaders we offer empirical evidence on firm level data of plant investments in the tft lcd panel industry where technological competition has been intense and dynamic we find that the followers level of technology has a non monotonic effect on technology improving investments with intermediate followers the most apt to invest in catch ups this result is a puzzle given the existing theory on technology race we also find that followers catch up investments increase with the capacity of the leader that employs the state of the art technology these results are robust to variations in specification and alternative accounts of effects we discuss our findings and contributions in light of the technology race literature

food safety regulation an overview of contemporary issues abstract this article discusses a number of issues that are influencing the evolution of food safety regulation in developed and to a lesser extent developing countries whilst not definitive it aims to highlight those factors which are considered crucial to an understanding of contemporary food safety controls in both the public and private spheres these issues include criteria applied to assess the need justification for food safety regulation relationships between public and private food safety control systems alternative forms that public food safety regulation can take strategic responses to food safety regulation and the trade implications of national food safety controls the article serves as an introduction to these issues which are discussed at greater length in the other papers that make up this special issue of food policy

how important is discount rate heterogeneity for wealth inequality abstract this paper investigates the role of discount rate heterogeneity for wealth inequality the key idea is to infer the distribution of preference parameters from the observed age profile of wealth inequality the contribution of preference heterogeneity to wealth inequality can then be measured using a quantitative life cycle model i find that discount rate heterogeneity increases the gini coefficient of wealth by around 0 07 to levels that are close to the data the share of wealth held by the richest 1 of households rises by around 0 04 but falls short of the data by more than 10 percentage points discount rate heterogeneity also helps to account for the large wealth inequality observed among households with similar lifetime earnings

intergenerational transfers and the accumulation of wealth h t ouseholds acquire wealth from two sources they save out of income they have earned and they receive transfers from other people the first method of wealth accumulation goes under the name of life cycle saving in which people save during their working lives and dissave after retirement the second involves either an inter vivos transfer that is a transfer between living people or a bequest a transfer that occurs at the death of the donor while inter vivos transfers and bequests will arise in dynastic models where preferences include a taste for the well being of one s descendents few empirical life cycle models reflect these concerns indeed a sharp debate has arisen over the ability of the simple life cycle model to explain observed wealth accumulation understanding the relative sizes of these sources of wealth accumulation affects a variety of issues for example the effects of government debt social insurance public transfer programs estate taxes and incentives for charitable giving depend to some extent on the magnitude and nature of private saving and transfers of wealth analyses of the inequality of wealth may depend on whether most of wealth is earned or received as transfers appropriate policies for encouraging private saving may look rather different depending on whether most saving is to be consumed later in life or passed along to the next generation finally evidence on transfer patterns relates to more fundamental

patent quality and research productivity measuring innovation with multiple indicators we analyse the determinants of the decline in research productivity using panel data on manufacturing firms in the us for the period 1980 93 we focus on three factors the level of demand the quality of patents and technological exhaustion we develop an index of patent quality using detailed patent information and show that using multiple indicators substantially reduces the measured variance in quality research productivity at the firm level is inversely related to patent quality and the level of demand as predicted by theory and patent quality is positively associated with the stock market value of firms