on the fixed nature of sharecropping contracts newbery and stiglitz i979 suggest four stylised facts of sharecropping which theories should attempt to explain the first is the persistence of sharecropping and its coexistence with fixed rental and wage markets under a variety of conditions over centuries of time the second is that in modern developed economies there appears to be a decline in share tenancy thirdly share tenancy is often but not alwavs associated with lower productivity than fixed rental land finally in many economies contracts involve shares of around one half for landlord and tenant this does not vary from contract to contract and does not seem to be the object of negotiation smith i776 and many subsequent authors have likened sharecropping to a tax they argue that under this type of contract tenants choose their labour supply to equate their marginal disutility of labour with their proportionate share of the marginal product instead of the full marginal product they therefore regard sharecropping as an inefficient form of land tenure however this view is difficult to reconcile with the first observation given the coexistence of fixed rent and share contracts it is reasonable to expect that if share contracts were relatively inefficient they would quickly die out this does not appear to have happened more recently it has been argued most notably by cheung i969 that if there is certainty and transactions costs are the same for all contracts then provided a share contract specifies the labour supply of the tenant it leads to the same efficient allocation of resources as a fixed rent or wage contract cheung has used this result as the basis of an explanation for coexistence he suggests that the transaction costs for share contracts are higher than for wage and fixed rent contracts however share contracts have the advantage that they allow the risk to be shared between the landlord and tenant whereas with fixed rent contracts the tenant bears all the risk and with wage contracts the landlord does given varying degrees of risk aversion among landlords and tenants it is possible that for some parties the risk sharing advantages outweigh the transaction cost disadvantages so that they will prefer share contracts whereas with others the reverse is true one problem with this argument raised by stiglitz i974 and newbery i977 is that given constant returns to scale the risk sharing properties of share contracts can be attained with mixtures of fixed rent and wage contracts if these do indeed have lower transaction costs share contracts would not then be observed

competition and corporate performance are people right to think that competition improves corporate performance my investigations indicate first that there are some theoretical reasons for believing this hypothesis to be correct but they are not overwhelming furthermore the existing empirical evidence on this question is weak however the results reported here based on an analysis of around 670 u k companies do provide some support for this view most important i present evidence that competition as measured by increased numbers of competitors or by lower levels of rents is associated with a significantly higher rate of total factor productivity growth

market share market value and innovation in a panel of british manufacturing firms this paper examines the empirical relationship between technological innovations market share and stock market value new developments in the estimation of dynamic count data models are used to control for unobserved firm specific heterogeneity we find a robust and positive effect of market share on observable headcounts of innovations and patents although increased product market competition in the industry tends to stimulate innovative activity furthermore the impact of innovation on market value is larger for firms with higher market shares we argue that our results are consistent with models where high market share firms have incentives to pre emptively innovate

assessing the functioning of land rental markets in ethiopia although a large theoretical literature discusses the possible inefficiency of sharecropping contracts the empirical evidence on this phenomenon has been ambiguous at best household level fixed effect estimates from about 8 500 plots operated by households that own and sharecrop land in the ethiopian highlands provide support for the hypothesis of marshallian inefficiency at the same time a factor adjustment model suggests that the extent to which rental markets allow households to attain their desired operational holding size is extremely limited our analysis points towards factor market imperfections no rental for oxen lack of alternative employment opportunities and tenure insecurity as possible reasons underlying such behavior suggesting that rather than worrying almost exclusively about marshallian inefficiency it is equally warranted to give due attention to the policy framework within which land rental markets operate

firm size wage gaps job responsibility and hierarchical matching i present the fact that wage gaps due to firm size increase with job responsibility i use swedish data to determine whether wage gaps increase with a direct measure of job responsibility to compare the age patterns of the wage gaps for blue and white collar workers and to compare wages by job responsibility and spans of control with u s data i compare supervisory to nonsupervisory occupations and find that wage gaps increase with job responsibility for most occupational ladders this fact is consistent with hierarchical matching models in which the larger number of subordinates amplifies managerial talent

decomposing learning by doing in new plants the paper examines learning by doing in the context of a production function in which the other arguments are labor human capital physical capital and vintage as a proxy for embodied technical c

wages profits and capital intensity evidence from matched worker firm data swedish data on workers matched with firms balance sheet reports are used to examine the relation between wages and firms ability to pay results indicate that experienced and highly educated workers are sorted into profitable firms wages are positively correlated with profits and the capital labor ratio after controlling for worker quality degree of effort supervision job characteristics local unemployment firms employment history and employer size lester s range of pay due to rent sharing is around 12 24 of the mean wage in sweden which is close to the estimates for the united states and united kingdom

comparative advantage learning and sectoral wage determination we develop a model in which a worker s skills determine the worker s current wage and sector the market and the worker are initially uncertain about some of the worker s skills endogenous wage changes and sector mobility occur as labor market participants learn about these unobserved skills we show how the model can be estimated using nonlinear instrumental variables techniques we apply our methodology to study wages and allocation of workers across occupations and industries using individual level panel data from the national longitudinal survey of youth we find that high wage sectors employ high skill workers and offer high returns to workers skills

the impact of high tech capital on productivity evidence from australia i introduction the bulk of the empirical research on the relationship between high tech capital investment and productivity has been based on data for the united states given the relatively large size of the high tech capital sector in the u s economy it is likely that the united states is a special case most economies resemble australia s in being net importers of high tech capital not producing high tech capital was often cited as a weakness in these economies relative to the united states however since the end of the late 1990s tech boom there has been a reappraisal of whether the production or the use of high tech capital is most beneficial hence to shed light on this debate the main purpose of this paper is to empirically examine the relationship between high tech capital use and the multifactor productivity mfp of 10 industries in the australian market sector using annual data for 1966 2002 alternative specifications of production functions are considered and estimated alternative measures of high tech capital are included with combinations of computers software and electronics capital in the first production function high tech capital is allowed to be more or less productive than other capital to determine whether there is a relationship between high tech capital and mfp it is also possible to test whether there are excess returns to high tech capital for robustness testing purposes a second production function is specified with high tech capital as a separate input into production other potential sources of mfp growth such as public capital research and development stocks and microeconomic reform are also included in the production functions we find evidence of a positive relationship between high tech capital and mfp in the market sector there is less evidence however of excess returns to high tech capital which suggests that current investment levels are not inadequate the results by industry suggest that the benefits of investing in high tech capital are not distributed evenly across the economy with only some industries experiencing a positive relationship between high tech capital and mfp the structure of this article is as follows in section ii the theoretical contribution of high tech capital to mfp and the evidence to date is reviewed in section iii the methodology is outlined in section iv data sources and trends are described in section v the results are presented and interpreted and section vi concludes ii the impact of high tech capital on output and productivity the theory and evidence the impact of investment in high tech capital has been the subject of debate between new economy sceptics and optimists for several years it is widely accepted that mfp has increased substantially in u s high tech producing industries in which the rate of technological change has been phenomenal over the past 40 years several publications have found a quantifiable contribution by computer producing industries to u s output growth 1 however australia is not generally regarded as a producer of computers data from the organisation for economic co operation and development oecd 1998 indicate that the high tech share of australian manufacturing value added was 4 5 in 1995 compared to 15 8 in the united states therefore the substantial u s economy wide mfp improvements specifically associated with its computer producing industry are unlikely to be replicated in the australian economy over the past 30 years there has been rapid accumulation of high tech capital in many countries australia was the third most intensive user of high tech capital in the oecd in 1995 behind the united states and new zealand simon and wardrop 2002 find that this rapid accumulation of high tech capital may have substantially contributed to australia s economic growth during the 1990s this accumulation has been driven by technological change in high tech producing industries lowering the price of high tech capital

hierarchical organization and performance inequality evidence from professional cycling this article proposes an equilibrium theory of the organization of work in an economy with an implicit market for productive time in this market agents buy or sell productive time this implicit market gives rise to the formation of teams organized in hierarchies with one leader buyer at the top and helpers sellers below relative to autarky hierarchical organization leads to higher within and between team payoffs productivity inequality this prediction is tested empirically in the context of professional road cycling we show that 46 of performance inequality in the tour de france is due to hierarchical organization within team whereas team composition only accounts for 6

a microfoundation for production functions assignment of heterogenous workers to heterogenous jobs in very different fields of economics economic inference and policy evaluation require economists to parametrize a production function that links measures of input factors to measures of output while doing so strong assumptions are implicitly made about microeconomic variables governing the shape of the aggregate production function in this paper i develop an assignment model that provides a microeconomic foundation for aggregate production functions the shape of the production function depends crucially on the distribution of workers and jobs and the type of technological changes depends crucially on the evolution of these distributions sufficient and necessary conditions are provided for the production function to be of the constant ratio of elasticities of substitution form a form nesting the broadly used constant elasticity of substitution form this model provides a way to evaluate how stringent assumptions about the type of production function or technological change are by comparing the implied distribution of jobs and its evolution over time to observations of the distribution of jobs and its evolution over time

tenure insecurity gender low cost land certification and land rental market participation in ethiopia abstract there is a renewed interest in whether land reforms can contribute to market development and poverty reduction in africa this paper assesses effects on the allocative efficiency of the land rental market of the low cost approach to land registration and certification of restricted property rights that was implemented in ethiopia in the late 1990s four rounds of a balanced household panel from 16 villages in northern ethiopia are analysed showing that land certification initially enhanced land rental market participation of potential tenant and landlord households especially those that are headed by females

rationing and adjustment in the market for tenancies the behavior of landowning households in thanjavur district a large proportion of peasants cultivate only their own land even when there are active markets for tenancies as well as labor however rationing of tenancies can occur under moral hazard or adverse selection a model that includes as possible outcomes both rationing and full adjustment through trading is analyzed and estimated using data from south india on this basis households can be characterized as rationed or adjusted and confidence intervals for these assignments can be calculated while some households achieved full adjustment a majority were rationed in the tenancy market many of them completely

the distributive impact of land markets in uganda abstract this article presents first hand evidence about land distribution and the impact of land markets in central uganda this area is characterized by unequal distribution of land inheritance rural rural migration and active land markets we show that land markets and particularly land purchases tend to reduce the initial inequality in the initial inherited distribution of land land purchases by landless farmers in their native village represent an important part of this adjustment

employer size and compensation the role of worker characteristics the substantial effect of employer size on wages health insurance and pension coverage is examined much of the size related variation in compensation is shown to result from the types of jobs and workers hired by large employers while firm and establishment size have similar effects on wages firm size effects clearly dominate in the provision of fringe benefits particularly for pensions worker and job types explain a larger share of the size related variation for wages than for health insurance or pension coverage possible explanations for these patterns are provided

job assignments signalling and efficiency this article analyzes a model in which information about a worker s ability is only directly revealed to the firm employing the worker other firms however use the worker s job assignment as a signal of ability three results recur throughout the analysis first wage rates tend to be more closely associated with jobs than with ability levels second there is frequently an inefficient assignment of workers to jobs i e even when a firm has complete information about a worker s output third the severity of this inefficiency tends to be negatively correlated with the level of firm specific human capital in the economy

different firm size effects on wages for supervisors and workers abstract we find that i the plant size effect for supervisors is at least double that of non supervisors ii the difference is statistically significant and iii the firm size effect for supervisors is not explained by differential returns on standard variables

a selectivity model of employer size wage differentials this article investigates wage differentials for employees of different size firms utilizing an econometric methodology that allows the size of employer to be treated as endogenous in the context of discrete ordered employer size data as a result we are able to estimate i employer size wage gaps which are corrected for selectivity bias and ii the magnitude and direction of the selection bias decompositions of the resulting wage differentials are computed with comparisons of the conditional on sorting across employer size and unconditional wage gaps

inequality and the organization of knowledge since the seminal work of lawrence f katz and kevin m murphy 1992 the study of wage inequality has taken as its starting point a neoclassical constant elasticity of substitution production function using as inputs capital and lowand high skill labor this approach assumes that the organization of production is fixed and determined by a particular specification of technology and it ignores both the source of the interaction between workers and the organizational aspects of this interaction these shortcomings are particularly important in light of growing empirical evidence that points first to the importance of decreases in the cost of processing and communicating information and second to the complementarity between organizational change and adjustments in the distribution of wages e g timothy f bresnahan et al 2002 this paper argues that theories that seek to guide empirical research on these areas must put knowledge and information at the center of the analysis of organizations and link the organizational structure with aggregate variables via equilibrium frameworks in garicano and rossi hansberg 2003 we present a model of this kind it determines the patterns of organization as manifested by the communication and specialization patterns and the implied wage structure that result from different costs of acquiring and communicating information here we present a simple variant of this theory that allows us to focus on one of the main aspects of that framework the sorting of agents into teams and the wage and organizational structure that accompanies that sorting we use this simple model to analyze the changes in organization and wages that result from a very specific type of technological change a reduction in the cost of communicating knowledge or information this model allows us to consider the effect on within class wage inequality and the impact of information technology on the creation and form of organizations e g size distribution of hierarchies however because knowledge is exogenously given and agents cannot invest in learning an important margin of the model in garicano and rossi hansberg 2003 is fixed namely the degree of decentralization or the extent to which problems are solved at lower levels that model allows the simultaneous study of the acquisition of knowledge spans of control and matching in equilibrium moreover it goes beyond the current analysis in that it allows for organizations with an unconstrained number of layers and in that it studies two aspects of the impact of information technology communication technology like here and the technology to acquire knowledge or information e g processing power through cheaper database access

information and the operation of markets tests based on a general equilibrium model of land leasing in india abstract this paper develops an estimable general equilibrium model of land leasing to test the extent to which information is commonly held in a village and whether village markets are efficient information regarding the relative farming skill of households is found to be widespread but the assumption of perfectly efficient markets within the village is rejected these results have ramifications for the estimation of agricultural household models and for our understanding of rural institutions the model is derived from the primitives of the production technology the extent of information and the distributions of assets and several household unobservables simultaneity and selection issues are dealt with explicitly in a two stage maximum likelihood estimation procedure using panel data from india

the internal economics of the firm evidence from personnel data we analyze twenty years of personnel data from one firm the hierarchical structure is quite simple and stable career movements suggest that the employee s rate of learning and the firm s learning about ability are important there are promotion fast tracks exit rates vary little with tenure or salary the firm has personnel policies like those described in the internal labor markets literature although several theoretical preconditions for ilms such as ports of entry and exit are lacking job levels are important to compensation but there is also substantial individual variation in pay within levels our companion paper in this issue explores the wage policy of this firm

growth technological change and ict diffusion recent evidence from oecd countries in this paper we present an overview of gdp and productivity growth patterns in oecd countries over the past decade on the basis of harmonized data our evidence suggests that fast growing countries generally shared three characteristics improvements in labour utilization a generalized enhancement in human capital and rapid shifts in the composition of physical capital towards information and communication technology ict equipment particularly we show that technological change embodied in new ict capital goods has been a primary source of output and productivity growth in ict using sectors the international comparison allows relating growth patterns to institutional and policy indicators thereby offering some preliminary insights into the potential sources of growth disparities cross country evidence yields some tentative support to the idea that institutional factors affecting competition in the product market are likely to affect productivity patterns especially in a period of rapid diffusion of a general purpose technology such as ict copyright 2002 oxford university press

competition imitation and growth with step by step innovation is more intense product market competition and imitation good or bad for growth this question is addressed in the context of an endogenous growth model with step by step innovations in which technological laggards must first catch up with the leading edge technology before battling for technological leadership in the future in contrast to earlier schumpeterian models in which innovations are always made by outsider firms who earn no rents if they fail to innovate and become monopolies if they do innovate here we find first that the usual schumpeterian effect of more intense product market competition pmc is almost always outweighed by the increased incentive for firms to innovate in order to escape competition so that pmc has a positive effect on growth second that a little imitation is almost always growth enhancing as it promotes more frequent neck and neck competition but too much imitation is unambiguously growth reducing the model thus points to complementary roles for competition anti trust policy and patent policy

promotion turnover and compensation in the executive labor market this paper develops a generalized roy model with human capital accumulation moral hazard and career concerns we identify and estimate the model with a large panel that matches data on publicly listed firms to information on their executives the structural estimates obtained are used to decompose the firm size pay gap we find that although total compensation and incentive pay increase with firm size certainty equivalent pay decreases with firm size in larger firms and for more highly ranked executives weaker signal quality about effort results in higher risk premiums this risk premium accounts for roughly 80 percent of the firm size gap in total compensation larger firms are also willing to pay more than smaller ones to attract executives finally the estimated coefficients on human capital accumulation from formal education and experience gained from different firms are individually significant but their collective effect on firm size pay differentials nets out

privatisation and x inefficiency a bargaining approach the usual analysis of privatization and x inefficiency uses agency theory to model managerial effort the authors model worker effort as determined by a bargain between firms and workers workers dislike effort because it lowers utility firms prefer high effort because it raises productivity public sector firms are assumed to be social welfare maximizers and therefore compared to private sector firms they bargain lower effort levels since they have the interests of consumers and workers at heart the authors model predicts that under certain conditions privatization should raise effort and so lower x inefficiency and that wages may increase or decrease copyright 1995 by blackwell publishing ltd

career dynamics and span of control we offer a model that combines a knowledge based organizational structure with progressive learning of employees talent we show that higher span of control is associated with better selected managers higher wages higher probability to be promoted and higher turn over in the early career stages these findings are in line with recent empirical evidence

occupational specificity of human capital we find that returns to occupational tenure are substantial everything else being constant 5 years of occupational tenure are associated with an increase in wages of 12 20 moreover when occupational experience is taken into account tenure with an industry or employer has relatively little importance in accounting for the wage one receives this finding is consistent with human capital being occupation specific

behavioural and material determinants of production relations in agriculture in this essay we develop a framework for analysing the major institutions governing the production and exchange of output and the primary factors of production in rural areas the analysis incorporates general considerations of risk and information constraints jointly with the principal material attributes of agriculture and of agricultural production factors the framework is used to analyse barriers to the existence of the major intertemporal and factor markets it is applied specifically to land scarce environments for which it provides an internally consistent explanation for many of the well documented institutional features of such settings in addition the analysis provides new implications for among other phenomena the inter relationships among ownership holdings operational scale family size and factor productivity for the scarcity of animal rental markets and use of animals as collateral for the renting out of land by small landowners and for the existence of plantations for certain crops

empirical analysis of occupational hierarchies using data on u s engineers and the position of engineering jobs within firms this paper estimates a model of hierarchies within firms the model extends rosen s 1982 model of recursive production to two skills and multiple hierarchy levels the model generates an empirical model that is nested within a general roy 1951 model of self selection maximum likelihood estimates of the parameters of the production technology and the skill experience profiles are estimated the results suggest that approximately two thirds of changes in employment shares across hierarchy levels across time are explained by demographic shifts in the stock of engineering skills most of the returns to experience and to assignment to higher hierarchy levels within firms are caused by skill accumulation and self selection rather than technological dierences across hierarchy levels

livestock and land share contracts in a hindu society this article examines factors related to a livestock rental market in western nepal and assesses whether this market is associated with caste differentiation and land rental market participation theoretical models for asset rich i e high caste households rich in land and livestock and asset poor i e low caste families households are presented to provide logical explanations for the existence of a livestock rental market and the synergy between livestock and land rental markets participation a combination of double hurdle models and bivariate ordered probit models were used to test the implications of the models consistent with the theoretical models land and livestock rich high caste households were more likely to rent out land and or livestock whereas land and livestock poor and credit constrained low caste households were more likely to rent livestock and land from others participation in the two markets was positively correlated indicating a synergistic relationship that may be due to production and transaction costs reducing benefits policies that can enhance the allocative efficiency of livestock and land rental markets can improve equity as well as efficiency of land use in nepal provision of livestock credit to land poor low caste households is also crucially dependent on their access to more long term contracts for land jel classifications q12 q15 q18

a selectivity model of household food marketing behavior in sub saharan africa the agricultural household s discrete decision of whether to participate in coarse grain markets is separated here from the continuous decision of how much to sell or buy conditional on participation failure to participate in markets results from high fixed transactions costs a selectivity model endogenously switches households into alternative market participation states correcting for bias caused by the exclusion of unobservable variables affecting both discrete and continuous decisions improved market information increases the probability of participation by sellers while access to cereals processing technology increases quantities transacted by both sellers and buyers conditional on participation

wage differentials employer size and unemployment the unique equilibrium solution to a game in which a continuum of individual employers choose permanent wage offers and a continuum of workers search by sequentially sampling from the set of offers is characterized wage dispersion is a robust outcome provided that workers search while employed as well as when unemployed the unique nondegenerate equilibrium distribution of wage offers is constructed for three cases 1 identical workers and employers 2 identical employers and an atomless distribution of worker supply prices and 3 identical workers and an atomless distribution of job productivities copyright 1998 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

the price of experience we identify a key role of factor supply driven by demographic changes in shaping several empirical regularities that are a focus of active research in macro and labor economics in particular demographic changes alone can account for the large movements of the return to experience over the last four decades for the differential dynamics of the age premium across education groups emphasized by katz and murphy 1992 for the differential dynamics of the college premium across age groups emphasized by card and lemieux 2001 and for the changes in cross sectional and cohort based life cycle profiles emphasized by kambourov and manovskii 2005 jel d91 e24 i23 j11 j24 j31