an examination of the antecedents and implications of patent scope this paper focuses on the concept of patent scope and contributes to existing research in three ways first it offers a re examination of the construct and identifies two dimensions of patent scope 1 the number of variations of the core inventive idea identified in the patent reflected in the number of claims in the patent e g merges and nelson 1994 and 2 the positioning of those variations in the inventive space which is reflected in the number of technological classes in which patent examiners classify those claims second it investigates the implications of patent scope for the firm s subsequent inventive performance and finds that when the scope of a patents spans across a higher number of technological classes the extent to which the inventing firm itself succeeds in building on the knowledge underlying its own patent is lower third it investigates the antecedents of scope and suggests that prior investment in scientific knowledge and in related inventive experience are two factors that affect the scope of the patents that firms develop the theoretical predictions elaborated in this paper are supported by an empirical examination of a longitudinal sample of firms in the photonics industry

towards an attention based view of the firm the central argument is that firm behavior is the result of how firms channel and distribute the attention of their decision makers what decision makers do depends on what issues and answers they focus their attention on what issues and answers they focus on depends on the specific situation and on how the firm s rules resources and relationships distribute various issues answers and decision makers into specific communications and procedures the paper develops these theoretical principles into a model of firm behavior and presents its implications for explaining firm behavior and adaptation 1997 by john wiley sons ltd

general technological capabilities product market fragmentation and markets for technology abstract the combination of a firm capability i e ability to generate general purpose technologies and a market structure condition i e fragmentation of downstream submarkets may encourage licensing in an industry that is the probability of licensing should increase when product markets are fragmented and technologies support general purposes evidence consistent with these predictions emerges from a 1993 to 2001 panel of 87 firms that owned at least one u s software security patent between 1976 and 2001 the analysis uncovers some fundamental characteristics of how external knowledge exploitation functions in particular technology markets thrive when product markets are fragmented and firms have the capability to produce general technologies

global and domestic utilization of industrial relevant science patent citation analysis of science technology interactions and knowledge flows abstract the development of science based technologies may draw heavily on codified and tacit outputs from both domestic research bases and foreign sources having a view of the scientific underpinnings of these technical innovations and related knowledge diffusion and utilization processes especially those concerning public financed basic research is of major importance to policymakers nowadays some of those scientific and technical inputs are pivotal to technical inventions and are acknowledged as such by explicit references citations to related research papers in the reference list on the corresponding patents this case study deals with citations to dutch authored research papers on uspto patents granted during the period 1987 1996 results of the citation analysis reveal several important features of contributions made by the dutch science base to dutch invented and or foreign invented patents such as 1 a marked overall increase of patent citations to dutch research papers and 2 significant differences between domestic and foreign citation patterns where 3 domestic citation links are dominated by author inventor self citations and patents originating from the large r d intensive multinational firms such as philips these findings provide new empirical evidence that patent citation analysis produces systemic quantitative data providing strategic background information regarding nation specific and sector specific factors in domestic and cross border science technology linkages and knowledge flows

the changing technology of technological change general and abstract knowledge and the division of innovative labour abstract in the past most innovations have resulted from empiricist procedures the outcome of each trial yielding knowledge that could not be readily extended to other contexts while trial and error may remain the primary engine of innovation developments in many scientific disciplines along with progress in computational capabilities and instrumentation are encouraging a new approach to industrial research instead of relying purely on trial and error the attempt is also to understand the principles governing the behaviour of objects and structures the result is that relevant information whatever its source can now be cast in frameworks and categories that are more universal the greater universality makes it possible for the innovation process to be organised in new ways firms can specialise and focus upon producing new knowledge and the locus of innovation may be spread across both users and producers more generally the use of general and abstract knowledge in innovation opens up the possibility for a division of labour in inventive activity the division of innovative labour the implications for public policy especially that on intellectual property rights are discussed

strike activity worker militancy and productivity change in manufacturing 1961 1981 the author hypothesizes a two way causality between intracontractual strikes and productivity change in u s manufacturing on the one hand strikes during the term of a contract which are thought to reflect more broadly practiced shop floor militancy slow the pace of productivity growth and on the other hand periods of rapid productivity growth provoke increased intracontractual strike activity among other forms of shop floor protest the model is tested with quarterly data from 1961 through 1981 modified two stage least squares estimates support the hypothesis of two way causality a specific finding is that shop floor confrontation played a significant role in the slump in manufacturing productivity that began in the mid 1960s but not in the more precipitous productivity slowdown of the post 1973 years

secular labor reallocation and business cycles we study the eect of mean preserving idiosyncratic industry shocks on business cycle outcomes we develop an empirical methodology using a local area s exposure to industry reallocation based on the area s initial industry composition and employment trends in the rest of the country over a full employment cycle using confidential employment data by local area and industry over the period 1980 2014 we find sharp evidence of reallocation contributing to worse employment outcomes during national recessions but not during national expansions we repeat our empirical exercise in a multi area multi sector search and matching model of the labor market the model reproduces the empirical results subject to inclusion of two key empirically plausible frictions imperfect mobility across industries and downward nominal wage rigidity combining the empirical and model results we conclude that reallocation can generate substantial amplification and persistence of business cycles at both the local and the aggregate level

industrial conflict and its implications for productivity growth the results of a factor analysis support the proposition that there are different dimensions to labor militance and that they behave differently over time further research is needed on the extent to which they are sensitive to changes in unemployment and the extent to which they can explain the behavior of productivity growth in the post war period if economic hard times enable employers to put labor on the defensive then ceteris paribus productivity growth may accelerate the critical implication for policymakers is that any effort to restore growth which does not take into account the distributive impact of increasing productivity will have only a limited success instead of simply exacerbating existing antagonisms between workers and companies policymakers need to address the source of the conflict the effect of increasing productivity on the quality of worklife 13 references 1 figure 2 tables

mark up pricing and the business cycle the microfoundation of the variable mark up while considerable attention has been paid either to the fixity or variability of the markup and thus the profit rate the existing literature has failed to develop a serious microeconomic underpinning the purpose of this paper is to construct a microeconomic model for the optimal cyclical behavior of the mark up and to analyze its implications for mark up variability the debate over the variability of the mark up has been primarily empirical in nature the major area of contention has centered around the demand sensitivity of the mark up on one hand proponents of a cyclically fluctuating mark up consider both cost and demand determinants of the mark up and focus on the income elasticity of demand to explain mark ups that rise during the expansion phase of the business cycle and decline during the contraction on the other hand there are the cost dominated theories of the mark up which predominantly argue that the mark up is constant over the cycle 2 while this debate rages on neither side has successfully explained the stylized facts of the cyclical mark up trajectory mark ups increase from the initial trough to the midexpansion of the typical business cycle and then decline from that point until the terminal trough 3 this oversight particularly the inability to explain the midexpansion decline in the mark up stems from either the lack of or incomplete consideration of demand determinants of the mark up a major shortcoming of traditional mark up models is the independent rather than interactive treatment of the effects of a changing cost structure and a changing set of competitive pressures on price and mark up determination the interconnection between cost induced price increases and the potential intensification of competitive demand pres

debt relief and debtor outcomes measuring the effects of consumer bankruptcy protection consumer bankruptcy is one of the largest social insurance programs in the united states but little is known about its impact on debtors we use 500 000 bankruptcy filings matched to administrative tax and foreclosure data to estimate the impact of chapter 13 bankruptcy protection on subsequent outcomes exploiting the random assignment of bankruptcy filings to judges we find that chapter 13 protection increases annual earnings by 5 562 decreases five year mortality by 1 2 percentage points and decreases five year foreclosure rates by 19 1 percentage points these results come primarily from the deterioration of outcomes among dismissed filers not gains by granted filers jel d14 i12 j22 j31 k35

juvenile incarceration human capital and future crime evidence from randomly assigned judges over 130 000 juveniles are detained in the united states each year with 70 000 in detention on any given day yet little is known about whether such a penalty deters future crime or interrupts social and human capital formation in a way that increases the likelihood of later criminal behavior this article uses the incarceration tendency of randomly assigned judges as an instrumental variable to estimate causal effects of juvenile incarceration on high school completion and adult recidivism estimates based on over 35 000 juvenile offenders over a 10 year period from a large urban county in the united states suggest that juvenile incarceration results in substantially lower high school completion rates and higher adult incarceration rates including for violent crimes in an attempt to understand the large effects we found that incarceration for this population could be very disruptive greatly reducing the likelihood of ever returning to school and for those who do return significantly increasing the likelihood of being classified as having an emotional or behavioral disorder jel codes k140 i210

the rise in the disability rolls and the decline in unemployment between 1984 and 2001 the share of nonelderly adults receiving social security disability insurance income di rose by 60 percent to 5 3 million beneficiaries rapid program growth despite improving aggregate health appears to be explained by reduced screening stringency declining demand for less skilled workers and an unforeseen increase in the earnings replacement rate we estimate that the sum of these forces doubled the labor force exit propensity of displaced high school dropouts after 1984 lowering measured u s unemployment by one half a percentage point steady state calculations augur a further 40 percent increase in the rate of di receipt

fortune favors the prepared firm a critical factor in industrial competitiveness is the ability of firms to exploit new technological developments we term this ability a firm s absorptive capacity and argue that such a capability not only enables a firm to exploit new extramural knowledge but to predict more accurately the nature of future technological advances we develop a stylized model in which we focus exclusively on firms decisions to invest in their absorptive capacities we first examine a monopolist s investment decision analyzing the path dependence of its investment and the effect of uncertainty we then consider the effect of competition by modeling the impact of entry on an incumbent s investment behavior implications for management and public policy are then discussed

appropriability and commercialization evidence from mit inventions the effects of appropriability on invention have been well studied but there has been little analysis of the effect of appropriability on the commercialization of existing inventions exploiting a database of 805 attempts by private firms to commercialize inventions licensed from the massachusetts institute of technology mit between 1980 and 1996 we explore the influence of several appropriability mechanisms on the commercialization and termination of projects to develop products based on university inventions our central hypothesis is that the relationship between a licensee s decision to either terminate or commercialize the invention is driven by the current market value of the invention as well as the option value of delaying its commercialization we use a competing risks framework that allows for nonparametric heterogeneity and correlated risks we find that better appropriability in the sense of more effective patent strength and secrecy has a strong negative effect on the hazard of license termination the effectiveness of learning has a strong positive effect on the hazard of technology commercialization while lead time has a negative effect

why do firms do basic research with their own money abstractthe question to be addressed is why do private firms perform basic research with their own money interest in this question derives from both analytical and utilitarian considerations there is empirical evidence in the united states which provides the main context for this paper supporting the view that basic research makes a significant contribution to the productivity growth of the economy 4 7 it is widely held that social returns from basic research are significant and higher than private returns and it is for this reason that most such activities continue to be financed by the taxpayer this also implies that measures aimed at increasing basic research by the private sector will be welfare improving in the united states the federal government in the years since the second world war has provided the vast majority of all funds devoted to basic research although the federal share has been declining in recent years and although that share is at its lowest level in about 20 years it still constitutes about two thirds of the total 10 this abstract was borrowed from another version of this item

immigration and wage dynamics evidence from the mexican peso crisis how does the us labor market absorb low skilled immigration i address this question using the 1995 mexican peso crisis an exogenous push factor that raised mexican migration to the us in the short run high immigration states see their low skilled labor force increase and native low skilled wages decrease with an implied local labor demand elasticity of 7 internal relocation dissipates this shock spatially in the long run the only lasting consequences are for low skilled natives who entered the labor force in high immigration years a simple quantitative many region model allows me to obtain the counterfactual local wage evolution absent the immigration shock

look before you leap market opportunity identification in emerging technology firms entrepreneurs play a fundamental role in bringing new technologies to market because technologies are often configurable to serve a variety of different markets it is possible for entrepreneurs to identify multiple market opportunities prior to the first market entry of their emerging firms and if they elect to do so to therefore have a choice of which market to enter first the empirical results presented in this paper offer three new insights regarding this important early stage choice in new firm creation first they reveal that serial entrepreneurs have learned through prior start up experience to generate a choice set of alternative market opportunities before deciding which one to pursue in their new firm creation second the analysis indicates that entrepreneurs who identify a choice set of market opportunities prior to first entry derive performance benefits by doing so third the positive relationship between the number of market opportunities identified prior to first entry and new firm performance is nonlinear and subject to decreasing marginal return the research literature has yet to acknowledge the notion of multiple opportunity identification prior to entry and the related idea of selecting the most favorable market opportunity for the creation of a new technology firm

on limiting or encouraging rivalry in technical progress the effect of patent scope decisions abstract this essay is on the effects of the scope of a patent e g how broad its allowed claims on subsequent inventing in a field it is argued that this depends on the topography of technical advance in a field in particular on how inventions are linked to each other and in the extent to which rapid technical advance requires a diversity of actors and minds as contrasted with being facilitated by express coordination of inventive activity technical advance is examined in several different fields with a focus on how patents influenced the pace and quality of development the authors conclude that allowing and enforcing broad patent claims tends to hinder technical progress

the determinants and welfare implications of us workers diverging location choices by skill 1980 2000 abstract from 1980 to 2000 the rise in the us college high school graduate wage gap coincided with increased geographic sorting as college graduates concentrated in high wage high rent cities this paper estimates a structural spatial equilibrium model to determine causes and welfare consequences of this increased skill sorting while local labor demand changes fundamentally caused the increased skill sorting it was further fueled by endogenous increases in amenities within higher skill cities changes in cities wages rents and endogenous amenities increased inequality between high school and college graduates by more than suggested by the increase in the college wage gap alone jel d31 i26 j24 j31 j61 r23

shift share designs theory and inference we study inference in shift share regression designs such as when a regional outcome is regressed on a weighted average of sectoral shocks using regional sector shares as weights we conduct a placebo exercise in which we estimate the effect of a shift share regressor constructed with randomly generated sectoral shocks on actual labor market outcomes across u s commuting zones tests based on commonly used standard errors with 5 nominal significance level reject the null of no effect in up to 55 of the placebo samples we use a stylized economic model to show that this overrejection problem arises because regression residuals are correlated across regions with similar sectoral shares independent of their geographic location we derive novel inference methods that are valid under arbitrary cross regional correlation in the regression residuals we show using popular applications of shift share designs that our methods may lead to substantially wider confidence intervals in practice

a penny for your quotes patent citations and the value of innovations the use ofpatents in economic research has been seriously hindered by the fact that patents vary enormously in their importance or value and hence simple patent counts cannot be informative about innovative output the purpose of this article is to put forward patent counts weighted by citations as indicators of the value of innovations thereby overcoming the limitations of simple counts the empirical analysis of a particular innovation computed tomography scanners indeed shows a close association between citation based patent indices and independent measures of the social value of innovations in that field moreover the weighting scheme appears to be nonlinear increasing in the number of citations implying that the informational content of citations rises at the margin as in previous studies simple patent counts are found to be highly correlated with contemporaneous rd however here the association is within afield over time rather than cross sectional

economic analysis and the quest for competitive advantage curred in the past decade between applied microeconomists and those who study business strategy business strategists have cast up a series of questions for industrial economists who have responded with numerous applications of economic theory and quantitative research methods this interchange has been fruitful and indeed more fruit remains for the picking i shall argue for centering the collaborative effort on what may be called committed competition rivalrous moves among incumbent producers that involve resource commitments that are irrevocable for nontrivial periods of time most concerns of business strategy are with policy choices that

how broad should the scope of patent protection be i explore the trade off between a patent s length that is its lifetime and its width that is its scope of coverage a wider patent generally reduces the distortion of consumers choices between the patented brand of the product and unpatented lower priced varieties sold by competitors but also permits higher prices which increase relative to profits the deadweight losses from consumers switching consumption out of the product class i show under what conditions infinitely lived but very narrowly focused patents are the socially efficient way to reward innovation and under what conditions very short lived but very broad patents are optimal

technological pre adaptation speciation and emergence of new technologies how corning invented and developed fiber optics this article investigates how established firms innovate and even initiate new technological trajectories we build on and expand the notion of technological speciation to describe how a new technology emerges when a firm leverages its technological knowledge into a new application domain current research on technological speciation does not investigate how firms accumulate the technological knowledge which they eventually redeploy into different domains nor does it clarify the precise role of luck historical accidents and foresight strategy in shaping the overall process this requires a finer grained investigation of the microprocesses and evolutionary forces underlying the dynamics of technological speciation to this end we use a longitudinal case study of corning s invention and development of fiber optics technology we focus less on testing theory and more on describing a phenomenon to generate new theoretical insight

contracting for tacit knowledge the provision of technical services in technology licensing contracts abstract recent research on the economic payoff from new technology has emphasized the importance of tacit knowledge or know how this paper shows that arm s length contract can overcome the problems in contracting for know how by bundling complementary inputs with know how in a technology package and leveraging the superior enforceability of contracts over the latter in the empirical part of this paper the relationship between bundling and transfer of know how is analyzed using indian data the results imply that tied sales of inputs may increase the efficiency of contracts involving the transfer of know how a striking result in the context of the current north south debates on intellectual property rights is the packaging of patents with know how

sectoral versus aggregate shocks a structural factor analysis of industrial production using factor methods we decompose industrial production ip into components arising from aggregate and sector specific shocks an approximate factor model finds that nearly all of ip variability is associated with common factors we then use a multisector growth model to adjust for the effects of input output linkages in the factor analysis thus a structural factor analysis indicates that the great moderation was characterized by a fall in the importance of aggregate shocks while the volatility of sectoral shocks was essentially unchanged consequently the role of idiosyncratic shocks increased considerably after the mid 1980s explaining half of the quarterly variation in ip

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

variation in employment growth in canada the role of external national regional and industrial factors this article investigates the effect of external national and sectoral shocks on canadian employment fluctuations at the national industrial and provincial levels we assume that employment growth in each industry province pair depends on u s growth lagged canadian growth at the national industrial and provincial levels an aggregate shock and shocks specific to each industry province and industry province pair we estimate that the u s and canadian shocks account for two thirds and a quarter respectively of aggregate variation sectoral shocks account for only one tenth of aggregate variation but represent 30 of the variation from canadian sources

trade inequality and the endogenous sorting ofheterogeneous workers abstract i present a new general equilibrium framework to quantify the effect of international trade on labor market outcomes such as the skill premium and reallocation of workers for a large number of countries worker level comparative advantage based on workers heterogeneous productivities is the key feature of the framework i use household level microdata to quantify key aspects of the model for 32 countries i find that the calibrated decline in trade costs during 2000 2007 increased between educational type inequality in most countries regardless of country level comparative advantages the worker level comparative advantage across sectors and occupations determines both the direction and the magnitude of the effect of trade on labor market outcomes i also find that trade liberalization during 2000 2007 significantly contributed to the decline in manufacturing employment and job polarization in high income countries in addition the model shows that the china effect measured by a decline in trade costs with china and an increase in china s manufacturing productivity during 2000 2007 increased inequality in most countries