gender occupational segregation and its impact on the gender wage differential among rural urban migrants a chinese case study since the late 1980s massive rural urban migration in china has attracted considerable attention from economists and policymakers both within and outside china one of the most striking features of rural urban migration is that job attainment among the migrants differs considerably between males and females it is of great interest to know the reasons for this difference and more importantly whether gender occupational segregation has a large impact on the gender wage differential among migrants this paper examines these issues using data on 1504 migrants collected in jinan city shandong province it is found that gender occupational segregation in this sector is mainly due to the unequal treatment of male and female attributes in occupational assignment and that this contributes very significantly to the gender wage differential among migrants a comparison with another study on china s rural industrial labour market is made which suggest that intra occupational gender wage discrimination is l

cost reduction competition and industry performance in many markets firms compete over time by expending resources with the purpose of reducing their costs sometimes the cost reducing investments operate directly on costs in many instances they take the form of developing new products that deliver what customers need more cheaply therefore product development can have the same ultimate effect as direct cost reduction in fact if one thinks of the product as the services it delivers to the customer in the way that lancaster pioneered then product development often is just cost reduction

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

the structure of canadian inter industry r d spillovers and the rates of return to r d this paper estimates the effects of interindustry r d spillovers on the production cost of nine major canadian industries production costs in all nine are affected by spillovers and six industries are influenced by at least two different source industries rates of return to r d capital for each industry are also estimated private rates of return on r d are at least two and a half times those on physical capital rates of return on r d inclusive of spillovers are also computed for industries that are major sources of spillover the spillover inclusive returns are at least twice the private returns copyright 1989 by blackwell publishing ltd

on the economically optimal exploitation of a renewable resource the case of a convex environment and a convex return function we investigate optimal policies for the exploitation of a renewable resource subject to a concave growth function and a convex return function we prove an important result on the elasticity of the objective function and apply it to give a characterization of the optimal harvesting paths in this class of models in particular we derive conditions such that all optimal programs converge to a fixed point or to a cycle of finite period and hence result in the conservation of the resource we also show which assumptions guarantee that extinction of the stock is optimal that nonconvex preferences or technologies cause problems for economic theory is well known as our model can formally be interpreted as an optimal growth model with nonconcave utility function our results are a further contribution on the dynamics of optimal paths in the general class of economic models with nonconcavities journal of economic literatureclassification numbers c61 e32 q20

evidence of under investment in energy r d in the united states and the impact of federal policy investments in energy technology research and development r d and in associated human and institutional capacity are fundamental to our ability to respond to changing economic and environmental needs this paper uses data on r d investments and patent records to examine the relationship between expenditures on r d and innovation with a particular focus on the energy sector we observe that r d spending and patents both overall and in the energy sector have been highly correlated over the past two decades in the us in addition we observe that the r d intensity of the us energy sector is extremely low when compared to other sectors we argue that the data illustrates the critical role of public policy as evidenced by the impact of recent technology transfer related legislation on the total number and on the ownership of innovations resulting from federally sponsored r d we conclude that there has been a significant and sustained pattern of under investment in the us energy sector and that recent declines in energy r d exacerbate this situation innovation for the us energy infrastructure is also a significant driver of the international energy economy thus the spillover from us under investment detracts from the global capacity to respond to emerging risks such as global warming

comparative equilibrium versus comparative statics two approaches are often used to analyse the effects of uncertainty upon individual decision making the comparative equilibrium approach compares an uncertain model with a certainty model usually with the random variable replaced by its mean the comparative statics approach introduces more uncertainty into an already uncertain model and considers the effects upon optimal decisions this paper demonstrates that these two approaches are qualitatively equivalent for the class of models where uncertainty is completely exogenous to the decision maker when individual decisions affect this uncertainty the two analyses are generally qualitatively different an example of each type of model is presented followed by a general analysis

the structure of the female male wage differential is it who you are what you do or where you work the efficacy of policies to narrow the malelfemale wage differential depends partly on the size of the portion s of the gap targeted previous research finds no between sex wage gap within occupations within employer job cell this is the first study to disentangle segregation by occupation from that based on employer or on job cell in five industries controlling for other forms of segregation occupational segregation produces a gap of 11 percent manufacturing to 26 percent services the wage gaps from establishment and job cell segregation are about 6 percent each since comparable worth acts on the occupation and job cell components it has a potentially large impact

cost competitive incentives for wind energy development in china institutional dynamics and policy changes abstract this paper presents an overview of the development of wind power in china the factors that affect the directions of wind power development are analyzed it examines the economics of windfarm development and compares it with conventional energy sources the major constraints in wind technology development and defects of the current policies are discussed it points out that wind power development should be subject to rational policy change and institutional adjustment it discusses the incentive mechanisms and institutional frameworks for future development particular importance is attributed to market incentives for wind power to reach the objectives of industrialization and commercialization a number of cost competitive incentive measures and policies are recommended i introducing market based mechanisms through standard power purchase agreement ii establishing effective investment policies and regulations to attract private investment iii promoting localization of wind turbine production iv adjusting tax and subsidy policies and v reforming governmental institutions to make clear rules and responsibilities for policymaking and enhancing communication coordination between relevant government agencies in order to formulate uniform and effective policies

diversifying entry some ex ante explanations for postentry survival and growth links between theoretically determined preentry conditions and the postentry performance of diversifying entries made by large industrial firms are examined industry firm and relatedness variabl

issues in measuring industrial r d abstract effective government science and technology policy requires a reliable database on industrial innovation this paper examines a number of issues concerning the measurement of industrial r d by analyzing the relationship between data reported in the nsf census rd 1 survey the basis for the official government r d statistics and data reported in two other sources firms 10 k reports and a federal procurement database we advance and test a hypothesis which accounts for systematic discrepancies between rd 1 and 10 k based estimates of company r d we also develop estimates of the extent of measurement error reflected in the various measures of r d and suggest some modifications to the rd 1 survey

knowledge capital and cost structure in the u s food and fiber industries we explore the existence and extent of scale economies arising from three different external knowledge capital factors investments in r d high tech and human capital these relationships are evaluated for the two and three digit level food and fiber processing industries from the 1960s through the 1980s the results generate strong evidence of scale economies but also suggest that the three knowledge capital factors have tended to reduce input use and thus costs for all privately demanded factors the impacts on private capital are particularly large although human capital appears to have a relatively large impact on labor use in the textiles industry

determinants of entry and exit an application of the compounded bivariate poisson distribution to u s industries 1972 1977 numerous empirical studies have applied a variety of approaches and data to examine the market entry of firms across industries one branch of studies which is the focus of the present paper uses industry level census data to examine the role of industry characteristics as entry barriers this research features estimation results from very large samples that cover a wide range of industries examples include mcguckin 19 orr 20 gorecki 9 10 duetsch 6 7 kessides 14 and chappell kimenyi and mayer 5 henceforth referred to as chappell et al 5 the above studies use net entry e g the number of firms in 1977 minus the number of firms in 1972 as a measure of the number of new entrants in a given industry with the exception of chappell et al classical regression models of net entry have been the tool of analysis chappell et al point out that because net entry data are integer valued and thus deviate from classical regression assumptions the statistical specification of net entry calls for a discrete probability distribution chappell et al base estimation on a univariate poisson distribution in the present paper we consider another aspect of the data and improve upon the approach of chappell et al observations on net entry actually reflect the difference between unobservable entry and exit flows and as such contain information on both entry and exit while this point is well understood the focus of net entry studies has been entry and the approach has been to model the data as a function of entry alone unfortunately the failure to incorporate the true informational content of the data into the estimation clouds the results in particular neglecting the dependence of the data on exits can produce misleading estimates of the entry parameters small values of net entry for example might merely reflect a balancing of strong entry and exit flows

demand pull technology push and government led incentives for non incremental technical change abstract rising expectations about future demand for new technologies increase the incentives for investments in innovation by enlarging payoffs to successful innovations how well does this notion of demand pull apply to non incremental technological change when demand is largely attributable to actions by governments in this case inventors of the most important inventions did not respond positively to strong demand pull policies filing of highly cited patents declined precipitously just as demand for wind power created a multi billion dollar market three explanations for this apparent inconsistency with the demand pull hypothesis played a role 1 the rapid convergence on a single dominant design limited the market opportunity for non incremental technical improvements 2 even though the policies implemented were stringent enough to stimulate demand uncertainty in their longevity dampened the incentives for inventions that were likely to take several years to pay off and 3 alternative explanations such as declining r d funding and weakening presidential engagement on energy appear to have been important

the endogenous relationship between innovation and diversification and the impact of technological resources on the form of diversification abstract this research has endeavoured to build on earlier research on the relationship between a firm s technological resources and the direction of its diversification by trying to confirm the endogeneity of this relationship and by addressing the influence of innovation on the choice of the mode of diversification based on a sample of spanish firms our results suggest that innovation drives diversification but not the reverse the second important finding of this research is the empirical confirmation that knowledge assets are not related to the diversification mode

complementarities of innovation activities an empirical analysis of the german manufacturing sector abstract innovation strategies in manufacturing often involve internal rd it is based on data from the german part of the community innovation survey cis 3 the results provide evidence for significant complementarities between internal r d and r d cooperation but cast doubt on the complementarity of internal and contracted r d since a productivity effect on firms patenting probability or sales with new products cannot be found

uncertainty and markets for renewable resources abstract the market allocation of renewable resources is examined when growth rates are affected by random disturbances given free access to a renewable resource environmental disturbances are shown to affect the biological survival of the resource the optimal solution is then examined and it is shown to be achieved by a competitive allocation when property rights are clearly defined given rational expectations or a complete set of contingent futures markets the stochastic dynamics are shown in each case to differ considerably from the deterministic model

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

on the organization of cooperative research and development theory and evidence abstract it has become increasingly prevalent that business firms often rival firms join forces in cooperative r and d to develop new technologies that they can use in their downstream business equity research joint ventures and non equity co development are the two major modes of organization and they differ in how ownership rights over newly developed technologies are assigned this paper addresses the question of when cooperative r and d should be carried out in a research joint venture as opposed to a co development program in a setting of contractual incompleteness the nature of the downstream business of participating firms is shown to determine the organization of cooperative r and d empirical evidence that is consistent with the theoretical analysis is also presented

capital costs and profitability abstract the paper estimates a line of business lb cost of capital and derives explicitly its link in long run competitive equilibrium to profitability measured as lb operating income to lb assets the ways that observed profitability differs from what would obtain in competitive equilibrium are explored

entry barriers exit and sunk costs an analysis the relationship between entry rates entry barriers and sunk costs are examined across a set of four digit industry data results indicate that product differentiation barriers reduce entry rates and sunk capital costs reduce exit rates whether entry and exit are truly simultaneous however is not clear

the innovative performance of in house and contracted r d in terms of patents and utility models abstract the standard empirical framework for analysing the r d patents relationship is widened both by examining the different role of in house and contracted r d in the innovative performance of firms and by considering patents and utility models counts as measures of innovation output patents and utility models are considered to approximate for significant and incremental innovations respectively applying count data econometrics to a panel data set of spanish manufacturing firms surveyed in the period 1990 1996 a transcendental production function is estimated which allows for non constant elasticities of the r d inputs the results indicate that significant innovations are mainly gestated in house whereas contracted r d seems more orientated towards innovations of incremental nature

optimal growth policy the role of skill heterogeneity a simple semi endogenous growth model is employed to show that optimal subsidization of both r d and capital costs is independent of the distribution of r d skills in the workforce this holds despite the empirically supported fact that a higher r d subsidy rate raises wages of r d workers

r d production structure and rates of return in the u s japanese and german manufacturing sectors a non separable dynamic factor demand model abstract the focus of this paper is an analysis of the production structure the demand for factor inputs and the rates of return in the manufacturing sector of three major industrialized countries the united states japan and germany the analysis is based on a dynamic factor demand model with two variable inputs labor and materials and two quasi fixed inputs capital and rd also for all countries the speed of adjustment for capital is found to be higher than that for r d

interindustry technology flows and productivity growth a reexamination the relationship between productivity growth and r and d intensity is reexamined using detailed data for 193 us manufacturing industries and a breakdown of r and d into own product and process improvement oriented components and imported r and d from other industries a significant interindustry relationship between total factor productivity growth and r and d intensity is reconfirmed with used r and d having larger coefficients than own product r and d components but own product r and d is also significant and the explanatory power of the used r and d component rather than the embodied component imported from other industries thus the evidence for r and d spillovers remains tenuous 6 references 2 tables

evaluating a dutch scheme for encouraging research development this paper contains an evaluation over the period 1984 1988 of an important instrument of dutch technology policy a generic subsidy on r d labor costs which especially favours small firms the evaluation is based on surveys among nearly 3000 subsidy using firms and on empirical analysis the surveys show that the subsidy effectively strengthened the r d activities of small firms in particular it can be concluded from the empirical analysis that the subsidy generated between 40 and 150 of additional r d spending given the large spill over effects of r d this probably means that the social benefits of the subsidy outweigh the costs the incubation period of subsidies like the dutch scheme require consistency and continuity of governmental r d policies in order to influence corporate strategies in particular those of small firms

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

the impact of r d investment on productivity new evidence using linked r d lrd data the impact of r d investment on productivity new evidence using linked r d lrd data this paper uses confidential census longitudinal microdata to examine the association between r d and productivity for the period 1972 1985 these data allow for significant improvements in measurement and model specification yielding more precise estimates of the returns to r d our results confirm the findings of existing studies 1 positive returns to r d investment 2 higher returns to company financed research 3 a productivity premium on basic research these results are robust to adjustments for influential outliers also our evidence suggests that the return to company financed r d is an increasing function of firm size i introduction robert solow s studies in the late 1950s dramatically changed perceptions of the sources of economic growth until this time the commonly held view was that improvements in economic welfare were achieved primarily through the use of more inputs in particular capital input however solow 1957 reported that only 10 percent of the twofold rise in u s per capita output during the years 1909 1949 was due to growth in the capital labor ratio the remainder was attributed to more efficient use of inputs or technological change solow also established a framework for estimating technological change a productivity residual or a measure of changes in output that could not be explained by changes in input use the solow residual in modified form has become virtually synonymous with the measurement of total factor productivity tfp growth jorgenson and griliches 1967 demonstrated that under the assumptions of constant returns to scale and competitive factor pricing changes in total factor productivity measure shifts in a production function rather than treat technological change as exogenous or manna from heaven many economists have explored its determinants r d investment is generally regarded as having a strong impact on productivity growth empirical analysis of the r d productivity connection has often been based on estimation of reduced form equations derived from the r d capital stock model griliches 1979 which extends the solow model to include the stock of technical knowledge or knowledge capital as a factor of production in addition to the standard factors of production physical capital labor intermediate materials and energy if the rate of depreciation of knowledge capital is assumed to be negligible tfp growth dtfp is a function of the intensity of r d investment rdint which is usually measured as the ratio of r d expenditure to sales 1 dtf p sub t alpha beta rdin t sub t u sub t where u sub t is a classical disturbance term the coefficient on r d intensity beta is interpreted as both the marginal product of knowledge capital and the rate of return to r d investment 1 estimates of beta at the company or line of business level are interpreted as measures of the private rate of return to r d or those that accrue to the firm or its investors due to incomplete appropriability or other factors this return may not equal the social return to this activity most empirical studies especially those based on aggregate and sectoral data have found evidence of a strong positive correlation between tfp growth and r d investment however results using firm level data have been mixed the finding that these two variables are uncorrelated is cause for concern because it implies that firms may not be able to earn significant returns on their investment in r d making them less likely to undertake this investment in the future even if it is socially desirable for them to do so we believe that it is important to reestimate this relationship because it is highly likely that existing firm level studies have been based on measures of tfp that are crude imprecise and unrepresentative

a technological communications costs model of r d consortia as public policy abstract for complex technologies the process of innovation and diffusion often requires close cooperation among people for learning what one another know the social and political context of those links among researchers is an important determinant of their efficiency where there are social and political barriers to those links free market structures are not well suited to minimizing the costs of the communication of technological information the paper develops a technological communications costs market failure model of r d results as impure public goods it shows how the design of the european r d consortia promoting public policies esprit and eureka helps firms overcome the market failures described by the model the analysis expands the traditional market failure justifications for a government role in industrial r d governments can play a positive economic role by helping firms overcome social and political barriers to negotiations and technological communications yet market failure arguments are not alone sufficient for policymaking so the paper considers the esprit and eureka policy designs in a political context as model policy tools for organizing public support for industrial r d

knowledge transfer in international acquisitions this paper reports on a multimethod study of knowledge transfer in international acquisitions using questionnaire data we show that the transfer of technological know how is facilitated by communication visits meetings and by time elapsed since acquisition while the transfer of patents is associated with the articulability of the knowledge the size of the acquired unit and the recency of the acquisition using case study data we show that the immediate post acquisition period is characterized by imposed one way transfers of knowledge from the acquirer to the acquired but over time this gives way to high quality reciprocal knowledge transfer

joint r d in low carbon technology development in china a case study of the wind turbine manufacturing industry abstract china faces the dual challenges of climate change and increased energy demand these challenges in turn increase the demand for wind energy development along with rapid growth in manufacturing capacity chinese companies have aspired to increase their innovation capacity in order to enhance their competitiveness in the market joint research and development r d is an attractive path for chinese companies striving to advance their r d capacity this paper examines joint r d between chinese wind turbine manufacturing companies and foreign design firms assessing the performance of joint r d activities in china using the structure conduct performance scp framework the study found that joint r d has improved chinese companies technical capacity human resources and financial growth however the effect on chinese companies innovation capacity is still limited because of unequal technical capacities of the two sides in collaboration as well as their preference for augmenting profits rather than technical capacity current joint r d mode is only the extension of licensing mode in wind turbine manufacturing industry

on the sources of technological change assessing the evidence this paper uses a selective review of the economic literature on technological change to support four points that are important for interpreting and incorporating technological change into formal models of energy and the environment the review 1 supports the notion that no single source dominates the process of technological change it supports roles for rd 3 indicates that these spillovers are often indirect requiring own industry activities to utilize and 4 indicates that simple experience curve calibrations often used in formal models likely include a range of sources of technological change in addition to learning by doing some of which might not be induced by the sorts of policies typically considered in the climate context

what percentage of innovations are patented empirical estimates for european firms abstract a 1993 survey on the innovative activities of europe s largest industrial firms obtained useable results on patenting activities for 604 respondents the data are used to calculate the sales weighted propensity rates for 19 industries the propensity rates equal the percentage of innovations for which a patent application is made the propensity rates for product innovations average 35 9 varying between 8 1 in textiles and 79 2 in pharmaceuticals the average for process innovations is 24 8 varying from 8 1 in textiles to 46 8 for precision instruments only four sectors have patent propensity rates for both product and process innovations combined that exceed 50 pharmaceuticals chemicals machinery and precision instruments regression results that control for the effect of industry sector show that patent propensity rates increase with firm size and are higher among firms that find patents to be an important method for preventing competitors from copying both product and process innovations the effect of secrecy is not so straightforward firms that find secrecy to be an important protection method for product innovations are less likely to patent as expected but secrecy has little effect on the propensity to patent process innovations the r d intensity of the firm has no effect on patent propensity rates for both product and process innovations the sector of activity has a strong influence on product patent propensities but very little effect on process patent propensities after controlling for the effect of other factors

r d capital rate of return on r d investment and spillover of r d in japanese manufacturing industries the effect of r 50d on productivity growth in japanese manufacturing industries is examined using more accurate firm r 50d expenditure data than widely used data based on financial statements series of r 50d capital are constructed then rate of return on r 50d investment is estimated in addition the impact of other industries r 50d on the productivity growth of an industry is also estimated an attempt is made to determine the effect of electronics technology upon the productivity growth of other industries through the transaction of the intermediate electronics goods with improved quality and through the diffusion of the new technological knowledge discovered japanese technology trade 1977 1981 copyright 1989 by mit press

purposive diversification of r d in manufacturing the r d diversification in manufacturing of large us firms is found to be purposive exploiting complementarities of various research activities and forming groups of related industry categories purposively diversified firms are seen to behave differently than randomly diversified or undiversified firms further the behavioral differences between purposively diversified firms and others result because the former allocate relatively more r d funds to industry categories where appropriability conditions are good and relatively fewer funds to those categories where appropriation of the returns from r d is difficult finally r d expenditure and productivity are more closely linked at the group level than at the industry category level suggesting knowledge spills across industry categories are important

equal pay for equal work evidence from sweden and a comparison with norway and the u s using a new data set covering most privately employed workers in sweden we compare gender wage differences to those previously reported for norway and the u s the central finding is that the wage gap is small when comparing men and women working in the same type of occupation for the same employer segregation of men and women by occupation accounts for more of the gap in sweden than in the other two countries in all three countries we find that segregation by occupation explains more than segregation by establishment and that institutional changes over the past two decades aimed at improving the status of women had little effect on the gender wage gap jel classification j16 j71

tracing the effects of agricultural commodity prices and food costs we estimate a system of product and input demand equations for food processing industries to trace the links among farm commodity prices food processing costs and food prices disembodied technical change which likely reflects increasing consumer demand for convenience and product variety has sharply reduced agricultural materials demand relative to most other food processing inputs this implies weakening impacts of farm price shocks on food prices but improving quality and falling relative prices for agricultural inputs in combination with increasing factor substitution has counteracted these forces to encourage greater usage of agricultural inputs in food processing and limit these trends food prices today often appear less responsive to farm price shocks than in the past a development sometimes attributed to failures in market institutions however powerful long run technological and social changes leading to adaptations in production processes and food consumption patterns have also altered the demand for primary agricultural materials by changing the structure of food processing industries the social shifts surrounding the expanded role of women in the labor force represent one striking example of such changes the fraction of married women in the labor force less than one third in 1960 rose sharply through the next three decades before stabilizing at around 61 in the 1990s such demographic shifts increased the demand for food products requiring less home preparation time which in combination with enhanced technology has led to more in plant processing of agricultural materials and likely a growing share of nonagricultural inputs in

intellectual property rights fdi r d and economic growth a cross country empirical analysis this paper aims to empirically examine how intellectual property rights iprs protection foreign direct investment fdi and research and development r d along with other possible variables may affect the economic growth of the host country using the panel data of 92 countries during 1970 2007 i conclude from the system generalised method of moments estimation that domestic investment share fdi r d capacity openness to trade human capital and iprs protection all have statistically significant and positive impacts on economic growth a further investigation of countries at different levels of development suggests two striking findings first besides the domestic investment openness human capital and iprs protection r d is the key to drive economic growth in the higher income countries while fdi is the engine of growth in both higher income and middle income countries second a positive and significant impact of iprs protection on economic growth is found in both higher income and lower income countries however such an impact is not detected in the middle income countries

interindustry r d spillovers rates of return and production in high tech industries this paper presents estimates of the productivity and factor bias effects of interindustry r d spillovers for five high tech industries each industry is distinguished as a separate spillover source the industries are each affected by r d spillovers and are themselves spillover sources thus a spillover network between the industries is estimated private and social rates of return to r d capital are calculated the private rates of return are generally greater than the returns to physical capital in addition the social rates of return are greater than the private rates the results show that there are significant differences between industries as to their importance as sources of r d spillovers this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item

gender segregation and earnings differences in the spanish labour market abstractthis article analyses the effects of different types of gender segregation on the gender wage differential for the spanish labour market matched employer employee data from a sample of 226 535 workers are used these workers are employed in 61 occupations within 26 492 establishments in 51 different industries workers belonging to the same industry establishment or job share common factors which cannot be observed and these factors affect wages if these unobservable variables are correlated with the explanatory variables their estimated effects will be biased for this reason we estimate the effects of each type of gender segregation on the wage gap using a robust specification to these possible correlations we obtain that industrial segregation by gender explains a lower part of the wage gap between men and women than previous researches found using standard regressions while the contributions of establishment segregation and occupational segregation within each establishment are greater

the gender gap in earnings an international comparison with european matched employer employee data this article examines the origin of the cross country heterogeneity of the gender wage gap in nine european countries using a unique harmonized international matched employer employee dataset our novel findings suggest that cross country differences in the intensity of female segregation into low paying workplaces is a relevant source of international differences in the size of the gap and that international disparities in the characteristics of wage structures are not very influential on the other hand the evidence is not fully conclusive with respect to the influence on the variations of the gap of different macroeconomic social and institutional country specific features considered previously in the literature

the effect of government funding on private industrial research and development a re assessment a number of previous studies have attempted to determine the effect of federal support of research and development r d performed in industry on the rate of private investment in r d by estimating regressions of private r d expenditure on federal industrial r d expenditure controlling for total demand sales and in some cases other variables this paper presents arguments and econometric evidence in support of the hypothesis that due to misspecification of the private r d equation i e failure to distinguish government sales from other sales previous estimates of the effect of federal industrial r d on private r d funding are seriously upwardly biased

bias in market r d portfolios abstract based on a simple contest model of product innovation we find that in accordance with conventional wisdom and contrary to much of the previous theoretical literature market competition implies an equilibrium level of risk which is too low from society s standpoint the intuition is that the divergence between private and social marginal benefits from rd and this probability is higher for lower risk projects

public r d policies and cost behavior of the us manufacturing industries abstract this paper estimates and evaluates the contribution of r d tax incentives and publicly financed r d investment policies in promoting the growth of output and privately funded r d investment in us manufacturing industries publicly financed r d induced cost savings but crowds out privately financed r d investment while the incremental r d tax credit and immediate deductibility provision of r d expenditures have a significant impact on privately financed r d investment the optimal mix of both instruments is an important element for sustaining a balanced growth in output and productivity in the manufacturing sector

structural dynamics of innovation networks funded by the european union in the context of systemic innovation of the renewable energy sector innovation in the renewable energy re sector relies on the concept of systemic innovation which requires interaction between two innovation aspects technology exploration and market exploitation the european union eu has introduced political instruments for systemic re innovation by integrating resources from different thematic and geographic areas however using these instruments to establish an ecosystem for systemic innovation remains unexplored this study develops a framework for evaluating the systemic innovation performance of networks through a time series analysis of network structural properties overall eu funded innovation networks have not evolved in a systemic direction first the network exhibits densely connected local clusters for technology exploration and market exploitation of re innovation which are disconnected from each other over time the gap between the two phases has weakened with increasing connectivity but the local clusters supporting either explorative or exploitative activities have diminished the existing networking linkages among organizations are considered ineffective because their positions in the network tend to display a mismatch with their innovation patterns this research presents policy suggestions for optimizing the exploration and exploitation activities in the eu s funding program and their complementarities to establish a systemic innovation environment in the re sector

fiscal incentives for research and development it is often argued that since the social return to r d exceeds the private return the government should provide incentives for r d expenditure this article considers the issue of the impact of such incentives on the fiscal position of the government using a simple comparative static model in particular it is argued that it is possible that the social return from r d might be sufficient to allow r d incentives to more than pay for themselves on the basis of the international evidence the model is calibrated to examine what values of the key parameters are required in order for this conclusion to hold

r d innovations and total factor productivity growth in british manufacturing 1989 r d innovations and total factor productivity growth in british manufacturing applied economics vol 21 no 11 pp 1549 1562

separate and unequal occupation establishment sex segregation and the gender wage gap the authors report the first large scale empirical investigation of within job wage differences between men and women in the same occupation and establishment using data first on blue collar and clerical employees from 16 u s industries in 1974 83 and second on employees in 10 professional and administrative occupations the authors report three findings first wage differences at the occupation establishment level were small even without controls for individual level characteristics hence within job wage discrimination was much less important than occupation establishment segregation for observed wage differences second establishment segregation was an important cause although not as important as occupational segregation of wage differences third establishment segregation was extensive as was occupational segregation

self reinforcing agglomerations an empirical industry study we test for the existence of endogenous agglomeration forces using structural econometric models after showing generally how to establish the existence of agglomeration forces empirically we undertake an industry study of the maritime industry in norway the results suggest that there are significant economies of scale in the maritime industry these economies of scale are mainly found in sub groups of a set of nine maritime industries this indicates that the maritime industry consists of two self reinforcing agglomerations but that there are few mechanisms actually keeping the two together jel classification c33 d24 o47 r11 r12

fostering a renewable energy technology industry an international comparison of wind industry policy support mechanisms this article examines the importance of national and sub national policies in supporting the development of successful global wind turbine manufacturing companies we explore the motivations behind establishing a local wind power industry and the paths that different countries have taken to develop indigenous large wind turbine manufacturing industries within their borders this is done through a cross country comparison of the policy support mechanisms that have been employed to directly and indirectly promote wind technology manufacturing in 12 countries we find that in many instances there is a clear relationship between a manufacturer s success in its home country market and its eventual success in the global wind power market whether new wind turbine manufacturing entrants are able to succeed will likely depend in part on the utilization of their turbines in their own domestic market which in turn will be influenced by the annual size and stability of that market consequently policies that support a sizable stable market for wind power in conjunction with policies that specifically provide incentives for wind power technology to be manufactured locally are most likely to result in the establishment of an internationally competitive wind industry

purposive diversification as a motive for merger abstract conglomerate mergers can increase the symmetry of diversified competitors operations theory and evidence about such symmetry show that the classic horizontal merger issue efficiency loss because of increased monopoly power versus efficiency gain because of reduced costs is the antitrust economics issue in conglomerate mergers even when there is no concern about the loss of potential competition

spillovers from publicly financed r d capital in high tech industries abstract this paper employs a dynamic production model to examine the short run effects of publicly financed r d capital on the cost structure of six high tech us manufacturing industries the results show that given an industry s output publicly financed r d capital reduces the variable production cost in all industries in addition an increase in publicly financed r d causes output to increase implying that producers as well consumers are better off despite the presence of strong monopoly power in some industries a low bound for the social rate of return to publicly financed r d is also calculated

beyond firm and industry effects on profitability in imperfect markets the federal trade commission s line of business data imply that the effect of an industry s seller concentration on profitability has been misinterpreted because it has not been conditioned on capital intensity conclusions that market share rather than seller concentration is the primary structural determinant of profitability and that mutual dependence recognized among oligopolistic sellers is less important than superiority effects of large share firms appear unwarranted significant firm effects exist and explanatory power for a conventional model of structure and performance is found to be small relative to that of the general linear model within which the conventional model is nested