a simple estimator for simultaneous models with censored endogenous reggressors this paper presents a simple two step estimator for models with censored endogenous regressors and sample selection bias the approach unifies the literature on censored endogenous regressors and sample selection bias and provides extensions the procedure employs generalized residuals to adjust for the inconsistency caused by the endogeneity of the censored regressors the paper also provides two new tests of weak exogeneity an empirical example examining the trade off between fringe benefits and wages indicates that the estimation procedure works well a monte carlo experiment suggests that the proposed tests have good power properties copyright 1993 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

smallholder market participation concepts and evidence from eastern and southern africa abstract this paper reviews the evidence on smallholder market participation with a focus on staple foodgrains i e cereals in eastern and southern africa in an effort to help better identify what interventions are most likely to break smallholders out of the semi subsistence poverty trap that appears to ensnare much of rural africa the conceptual and empirical evidence suggests that interventions aimed at facilitating smallholder organization at reducing the costs of intermarket commerce and perhaps especially at improving poorer households access to improved technologies and productive assets are central to stimulating smallholder market participation and escape from semi subsistence poverty traps macroeconomic and trade policy tools appear less useful in inducing market participation by poor smallholders in the region

market power of local cable television franchises evidence from the effects of deregulation the 1989 cable act eliminated most price regulation of cable television operators including the right of municipalities to enforce price terms in franchise agreements deregulation was justified at least partially by the contention that competition from other entertainment media eliminated any market power of cable franchises we examine the value at sale of existing cable systems before and after deregulation assuming that this value represents the expected present value of future profits deregulation had the predicted negligible effect on profits in cities with significant broadcast competition however profits appear to have increased in areas where the competition from broadcast television was less severe we explore several explanations for this increase and conclude that significant market power is the most plausible explanation

price wars in price setting supergames this paper presents a method of generating price wars in price setting supergames the market is one where symmetric oligopolists produce a differentiated product and use price as a strategic variable prices are posted and can be observed by all there is thus little uncertainty or scope for secret price cutting nevertheless price wars occur they are precipitated by periodic but infrequent demand shocks firms use the wars to learn about changed conditions in the market so that they can calculate the new stationary nash equilibrium learning is modeled in a bayesian fashion via the kalman filter copyright 1989 by the london school of economics and political science

the ethiopian commodity exchange and spatial price dispersion abstract in this article we study the impact of an institutional intervention on market efficiency in ethiopia more specifically we analyze to what extent the ethiopian commodity exchange ecx in combination with regional warehouses have contributed to a reduction in price spreads between regional markets our hypothesis is that warehouses connected to the ecx reduce the dispersion between export prices and local retail prices in different coffee growing areas as well as the dispersion between export prices and local retail prices in different coffee growing areas by doing so the ecx has the potential to improve the market efficiency to identify the causal effect we combine retail price data with information on the gradual rollout of warehouses connected to the ecx from 2007 to 2012 our results suggest that when two markets both have access to an operating warehouse the average price spread is 0 86 1 78 etb lower than it is for markets where at least one part lacks warehouse access this is a substantial reduction considering that the average price spread over the full period is 3 33 etb the main results are robust to various econometric specifications and our analysis thus suggests that local warehouses connected to the ecx have indeed improved market efficiency

regulatory fog the role of information in regulatory persistence abstract regulation is very persistent even when inefficient we propose an explanation for regulatory persistence based on regulatory fog the phenomenon by which regulation obscures information regarding the value of counterfactual policies we construct a dynamic model of regulation in which the underlying need for regulation varies stochastically and regulation undermines the social planner s ability to observe the state of the world compared to a full information benchmark regulation is highly persistent often lasting indefinitely regulatory fog is robust to a broad range of partially informative policies and can be quite detrimental to social welfare regulatory experiments modeled as costly and imperfect signals of the underlying state do not eliminate the effects of regulatory fog we characterize their effects and provide a framework for choosing amongst a set of potential regulatory experiments

trade wages and the political economy of trade protection evidence from the colombian trade reforms abstract worker industry affiliation plays a crucial role in how trade policy affects wages in many trade models yet most research has focused on how trade policy affects wages by altering the economy wide returns to a specific worker characteristic i e skill or education rather than through worker industry affiliation this paper exploits drastic trade liberalizations in colombia in the 1980s and 1990s to investigate the relationship between protection and industry wage premiums we relate wage premiums to trade policy in an empirical framework that accounts for the political economy of trade protection accounting for time invariant political economy factors is critical when we do not control for unobserved time invariant industry characteristics we find that workers in protected sectors earn less than workers with similar observable characteristics in unprotected sectors allowing for industry fixed effects reverses the result trade protection increases relative wages this positive relationship persists when we instrument for tariff changes our results are in line with short and medium run models of trade where labor is immobile across sectors or alternatively with the existence of industry rents that are reduced by trade liberalization in the context of the current debate on the rising income inequality in developing countries our findings point to a source of disparity beyond the well documented rise in the economy wide skill premium because tariff reductions were proportionately larger in sectors employing a high fraction of less skilled workers the decrease in the wage premiums in these sectors affected such workers disproportionately

price setting supergames with capacity constraints this paper examines the role of industry capacity in enforcing collusion in the context of repeated games for a fixed capacity per firm it is shown that changes in the number of firms have a non monotone effect on the best enforceable cartel price this is due to the fact that while an additional firm lowers the share that each of the other firms enjoys at the collusive price it also increases the losses to each firm should the cartel fail

testing for imperfect competition at the fulton fish market in this article i report the results of a study of the prices paid by individual buyers at the fulton fish market in new york city in principle this is a highly competitive market in which there should be no predictable price differences across customers who are equally costly to service the results indicate that different buyers pay different prices for fish of identical quality for example asian buyers pay 7 less for whiting than do white buyers a result which is inconsistent with the model of perfect competition

measuring the effects of regulation with stock price data this article examines the usefulness of stock returns in measuring the effects of regulation when the dates on which market expectations change are not known and standard sources e g the wall street journal are used to choose announcement dates twenty major changes in regulatory constraint since 1887 are considered tests using either monthly or daily data are found to have surprisingly little ability to detect the effects of regulation the evidence shows that formal regulatory announcements are generally anticipated in cases where it is unclear when expectations change

the competitive effects of resale price maintenance the competitive effects of resale price maintenance rpm are theoretically diverse rpm can cause allocation distortions or promote productive efficiencies in the distribution process moreover extant cross sectional empirical evidence is incapable of distinguishing among the potentially disparate effects of rpm this paper conducts hypothesis tests of the alternative theories of rpm the empirical framework relates estimates of the effects of rpm for a cross section of observations to necessary conditions of the alternative models this analysis indicates that rpm is used both to foster cartels and promote efficiencies in the distribution process this result is consistent with the growing body of case study analysis that suggests that rpm is used for a variety of reasons this result also questions the current per se illegal status of rpm in the antitrust laws evidence is also provided concerning the strategic interaction between manufacturers and dealers in the distribution process and the use of financial data in analyzing propositions in industrial organization

optimal bid selection for dichotomous choice contingent valuation surveys abstract this paper develops a model for optimal survey design for the dichotomous choice contingent valuation method that finds the bid amounts as well as the sample sizes corresponding to each bid the model uses an iterative procedure to select the survey design that minimizes the mean square error of the welfare measure a set of monte carlo simulations shows that the model produces significantly lower mean squared errors for the welfare estimate than the next best model produces survey design under alternative assumptions regarding the statistical distribution of the welfare measure is also addressed the model produced significantly different survey designs depending on whether the distribution was assumed to be symmetric or asymmetric

the impact of deregulation on the production structure of the motor carrier industry empirical analysis of the motor carrier industry pre and post regulatory reform reveals that deregulation resulted in significant changes in firm production structure and lower real average costs translog cost functions for firms operating in 1977 and 1983 were estimated and compared for other specialized commodity carriers fitted average costs were computed from these functions the results indicate significant differences in the cost functions and real costs that cannot be attributed to technological changes but rather suggest efficiency gains the results also suggest that it is inappropriate to predict outcomes of deregulation using empirical analyses of firms in the regulated environment

measuring the difference in mean willingness to pay when dichotomous choice contingent valuation responses are not independent dichotomous choice contingent valuation surveys frequently elicit multiple values in a single questionnaire if individual responses are correlated across scenarios the standard approach of estimating willingness to pay wtp functions independently for each scenario may result in biased estimates of the significance of the difference in mean wtp values this paper applies an alternative bivariate probit approach that explicitly accounts for correlation across errors in the estimation of wtp and mean wtp using data from three separate dichotomous choice contingent valuation studies this correlation is demonstrated to have an effect on the significance level of mean wtp difference tests

collective bargaining after deregulation do the teamsters still count using data from the american trucking associations and a 1991 telephone survey of 223 major firms in the general freight segment of the trucking industry sic 4213 the author describes the restructuring of the trucking industry that occurred following economic deregulation that began in 1977 and examines how that restructuring affected industrial relations outcomes such as wages and union strength he finds that both market concentration and competition increased after 1977 he also concludes that regulatory restructuring led the general freight industry to divide into two sectors one handling full truckload shipments shipments of 10 000 pounds or more and one handling less than truckload shipments the teamsters union lost bargaining power in the truckload sector but it retained much of its bargaining power within the less than truckload sector

gradual incorporation of information pharmaceutical stocks and the evolution of president clinton s health care reform abstract we examine the effect of the evolution of president clinton s health care reform proposal over january 1992 october 1993 on pharmaceutical stock prices we identify a 52 3 percent decline in market adjusted prices which we then associate with health care reform applying a new technique isotonic regression we find most of the decline occurred gradually much of the decline occurred as the clinton plan adopted strategies to contain health care costs including managed competition and implicit regulation indirect evidence suggests that the wealth lost by pharmaceutical companies may have been largely an anticipated transfer our results are relevant to understanding the likely effects of the clinton plan and more recent proposals many other policy changes are marked by gradual public revelation of information which may not be completely observable by a researcher our approach may uncover information about the anticipated effects of policies unavailable from a traditional event study

combining contingent valuation and choice experiments a forestry application in spain when many good variants are to be valued like in several forest management programs which differ in the attribute levels the contingent valuation method may not be a practical option given the cost and time involved to value each variant separately there are at least three alternative procedures in such situations one i is to apply an attribute based valuation method like a choice experiment ce another ii is to conduct a cvm and a ce exercise and estimate a joint model a third one iii is to use the cvm estimates to value a base scenario and then use the ce results to adjust the cvm estimates for any new different scenario a numerical simulation and an empirical application to an afforestation program in spain show that the latter is the procedure that yields closer values to the cvm estimations followed by ii

an econometric analysis of changes in the cost and production structure of the trucking industry 1953 1982 a cost function is estimated using a time series cross section database for the trucking industry covering the time period from 1953 through 1982 i e after the implementation of the motor carrier act of 1980 which essentially deregulated the industry two conclusions emerge first similarities between early periods of regulation and deregulation are greater than between early and late periods of regulation second a comparison of the regulated and deregulated cost functions indicates that the heaviest burden of regulation was borne by those firms which faced the highest costs copyright 1988 by mit press

shareholder wealth effects of legislative events the case of airline deregulation this paper presents empirical evidence about the impact on shareholder wealth of legislative events leading to the enactment of the airline deregulation act of 1978 in contrast to prior regulatory event studies this paper examines not only the final legislative enactment but also the congressional hearings that preceded it no significant effect on shareholder wealth is indicated when averaged across all airline firms and all legislative events impact of deregulation however was expected to be different for trunk airlines than for local airlines moreover market expectations likely changed with the change in the political climate during the course of deregulation deliberations from an industry financial health emphasis under a republican ford administration to a consumer welfare emphasis under a democratic carter administration we find that trunk airlines experienced significant positive abnormal returns during the ford administration but negative abnormal returns during the carter administration in contrast local airlines exhibited significant negative abnormal returns during both the ford and carter eras systematic risk of both trunk and local airlines also increased with the change in the political climate

stock market reactions to the depository institutions deregulation and monetary control act of 1980 abstract this paper evaluates the effects of events leading to the passage of the depository institutions deregulation and monetary control act of 1980 the evidence suggests that the initial proposal of the act by then president carter and the final passage of the act by the house of representatives produced positive abnormal returns to stockholders of large commercial banks stockholders of small commercial banks and small savings and loans on the other hand generally experienced negative abnormal returns furthermore when hopes of passage of the act faced significant negative positive abnormal returns were experienced by stockholders of large small commercial banks

does one size fit all heterogeneity in the valuation of community forestry programs abstract through the implementation of a choice experiment valuation exercise this study set out to identify the set of community plantation attributes that impact the welfare of potential community forestry program participants we employed a combination of choice models to evaluate the preferences welfare impacts and choice elasticities associated with alternative community forestry programs allowing for different assumptions regarding heterogeneity in line with economic theory increased participation costs reduced the demand for community forestry while increases in expected productivity raised the demand with respect to preferences for the other alternatives considered type of forest area enclosure and type of land upon which the forest was to be situated the results point to significant differences in preferences across the study population suggesting that programs should be tailored to the communities in which the program is to be implemented

entry and competitive structure in deregulated airline markets an event study analysis of people express this paper proposes an alternative approach to the study of competitive structure in deregulated airline markets that avoids some of the weaknesses of previous studies this approach uses reactions of incumbent airlines stock prices to announcements of entry by people express to shed light on competitive structure these stock reactions reveal significant route specific profits or sunk costs and also provide evidence on the degree of competitive localization present in the industry the conclusions emerging from this analysis are corroborated by an examination of price sales quantity and schedule changes that followed people express entry

an examination of the impact of the garn st germain depository institutions act of 1982 on commercial banks and savings and loans this paper evaluates the effects of events leading to the passage of the garn st germain depository institutions act of 1982 the evidence suggests that the call for reform by president reagan s housing commission and the senate passage of the bill produced positive abnormal returns to stockholders of large savings and loans and commercial banks stockholders of small s ls and banks on the other hand generally experienced negative abnormal returns furthermore when hopes of passage of the act faded significant negative positive abnormal returns were experienced by stockholders of large small s ls and banks this study examines the impact of the passage of the garn st germain depository institutions gsgdi act of 1982 on commercial bank and savings and loan stockholder returns the gsgdi act represents one of two major revisions of the financial system over the last twenty years the other being the depository institutions deregulation and monetary control act of 19801 the proposal for such a change reflected the growing inadequacy of the regulatory structure of financial institutions to adapt to rapid changes in technology shifting consumer demands for financial services and extremely volatile interest rates efforts to reform the financial system resulted in passage of the gsgdi act of 1982 which included provisions seeking to improve both the implementation of monetary policy and the degree of equity in the regulation of financial institutions such improvements were intended to reduce the operational and financial risk of financial institutions a central issue in the economics of regulation is whether regulatory actions benefit the economic agents they are intended to benefit a large body of literature exists which examines the economic effects of regulation much of this literature has utilized the concepts and methods of welfare economics to assess the extent

auditor reputation the impact of critical reports issued by government inspectors in recent years u k department of trade investigations into the affairs of a specific company have sometimes been critical of the work done by its auditors and reporting accountants this article assesses the impact of this criticism on the auditor s reputation in particular it examines the stock price performance of the auditor s listed clients the results show a small wealth loss for the audit clients the article also examines the impact of the department of trade criticism on an audit firm s number of listed clients and its future audit fees compared to a control group the criticized auditors appear to suffer a small loss in market share based on number of listed clients and on audit fees the evidence suggests that criticized auditors incurred economic losses from the damage to their reputations this is consistent with models of reputation advanced in the industrial organization literature

market news in commodity price theory application to the ethiopian grain market this paper examines the effect of news or advance information about future production on competitive storage behaviour and prices using a structural model of commodity markets in particular it generalizes the neoclassical storage model to incorporate information on future harvests while allowing for seasonal production two features important to african and other developing country grain markets the model is first developed to suit the case of the ethiopian grain markets and a general model is then stated the effects on welfare and price variability of the addition of news are discussed as well as changes in key demand and uncertainty parameters the model is shown to replicate some features of the data better than the model without news particularly the high autocorrelation in price and performs better in formal estimation however it appears that the incorporation of news still fails to explain the extreme seasonal price movements observed copyright 2004 wiley blackwell

the economic incidence of the interstate commerce act of 1887 a theoretical and empirical analysis of the short haul pricing constraint the public and private interest hypotheses permeate contemporary regulatory analyses both theories are used to explain the inception of the first major federal regulatory agency the interstate commerce commission icc according to the public and private interest hypotheses the regulations promulgated by the icc benefited either railroads or shippers this paper presents an alternative view consistent with the multiple interest theory of regulation it is demonstrated that the major regulatory instrument of the icc the short haul pricing constraint shpc altered the equilibria of railroad markets in a way which benefitted the class of shippers short haul shippers facing monopolistic railroad markets the shpc also benefitted some railroads by increasing the correspondence between unregulated cooperative and regulated noncooperative levels of long haul shipments the proposition that the icc benefited short haul shippers and railroads is supported by an empirical analysis of the effects of the inception of federal regulation and implementation of the shpc on stock prices the results of the paper indicate that the public and private interest interpretations of the icc are neither contradictory nor complete but instead are complementary a theoretical and empirical analysis of the chief regulatory mechanism of the icc provides this synthesis

using stock price data to measure the effects of regulation the interstate commerce act and the railroad industry this article usesjinancial data to measure the effects of the passage of the interstate commerce act of 1887 and subsequent legislative and judicial developments on firms in the railroad industry the results indicate that the interstate commerce act had a significant positive impact on railroad stock prices and that court decisions in the 1890s which severely restricted the powers of the interstate commerce commission caused negative stock price reactions thesefindings offer support for the revisionist view of regulatory history according to which the railroads welcomed regulation as a means offacilitating the enforcement of cartel like agreements

a comparison of stated preference methods for environmental valuation this paper presents an empirical comparison of contingent valuation cvm and choice experiments which are used to value environmental quality changes both of these methods require individuals to state their preferences for environmental qualities however choice experiments differ from cvm in that environmental attributes are varied in an experimental design which requires respondents to make repeated choices between bundles of attributes the empirical application involved the effect of environmental quality changes arising from forest management practices on recreational moose hunting values significant differences were found between the values derived from the two methods however detailed examination of the implied choice behaviour suggested that respondents ignored substitute recreation areas in the cvm question restricting the choice experiment model to consider only the one site where quality was varied resulted in welfare estimates similar to the cvm model this highlights the importance of substitutes in environmental valuation and suggests that choice experiments may be more appropriate than cvm in some cases

using choice experiments to value the environment this paper we outline the choice experiment approach to environmental valuation this approach has its roots in lancaster s characteristics theory of value in random utility theory and in experimental design we show how marginal values for the attributes of environmental assets such as forests and rivers can be estimated from pair wise choices as well as the value of the environmental asset as a whole these choice pairs are designed so as to allow efficient statistical estimation of the underlying utility function and to minimise required sample size choice experiments have important advantages over other environmental valuation methods such as contingent valuation and travel cost type models although many design issues remain unresolved applications to environmental issues have so far been relatively limited we illustrate the use of choice experiments with reference to a recent uk study on public preferences for alternative forest landscapes this study allows us to perform a convergent validity test on the choice experiment estimates of willingness to pay

choice modelling approaches a superior alternative for environmental valuation in this paper we examine some popular choice modelling approaches to environmental valuation which can be considered as alternatives to more familiar valuation techniques based on stated preferences such as the contingent valuation method a number of choice modelling methods are consistent with consumer theory and its focus on an attribute based theory of value permits a superior representation of many environmental management contexts however choice modelling surveys can place a severe cognitive burden upon respondents and induce satisficing rather than maximising behavioural patterns in this framework we seek to identify the best available choice modelling alternative and investigate its potential to solve some of the major biases associated with standard contingent valuation we then discuss its use in the light of policy appraisal needs within the eu an application to the demand for rock climbing in scotland is provided as an illustration

can agricultural traders be trusted evidence from coffee in ethiopia summary traditional food marketing systems in developing countries are often not trusted in consequence policy makers frequently try to regulate them and modern marketing arrangements are increasingly emerging to address some of their presumed deficiencies however it is unclear how trustworthy these markets actually are the purpose of this study is to look at these issues in the case of coffee marketing in ethiopia coffee markets in ethiopia present an interesting case study due to the high price and quality differentiation linked to a number of both easily and not so easily observable characteristics moreover modern marketing practices such as modern retail branding and packaging are becoming increasingly common in ethiopia s urban coffee markets when we define and examine trustworthiness in the addis ababa coffee market as a function of weights and quality we find that traditional traders are relatively trustworthy on observable quality characteristics and weights however there is a consistent pattern of over representation of not so easily verifiable quality characteristics we further find that modern marketing outlets or formats including modern domestic retail and branded packaged products deliver higher quality at a higher price but are not more trustworthy than traditional marketing arrangements in terms of these dimensions of trade transactions

imperfect information screening and the costs of informal lending a study of a rural credit market in pakistan many governments have perceived the rural moneylender as usurious this article takes a first step toward directly testing the validity of this view in a study of services costs and charges of fourteen informal market moneylenders and their clients in chambar pakistan the article examines whether the high implicit interest rates charged reflect the actual costs of operating in that market estimates of the resource costs incurred by informal lenders for screening pursuing delinquent loans overhead and cost of capital including unrecoverable loans suggest that lenders charges are equal to their average cost of lending but exceed their marginal cost this finding is consistent with the view that the informal credit market is characterized by excess capacity and monopolistic competition in the presence of imperfect information

value event studies this paper discusses appropriate methodology for measuring the effect of an event on the value of a firm s equity th e key points are 1 cumulative abnormal returns do not measure the effect of an event on firm value if there are dividends during the event window 2 it is generally appropriate to use pre event parameters of the return generating process even if the event alters the parameters during the event window and 3 controlling for fact ors other than the return on the market portfolio improves the power of the estimation the formula for the effect of an event on the value of a firm when there are dividends during the event window is developed a nd applied to a study of the effect of the bhopal disaster on the value of union carbide copyright 1992 by mit press

strategic responses to regulatory threat in the credit card market abstract models of endogenous regulatory threat suggest that firms may cut prices in order to ease a threat of regulation i test the implications of these models using stock market data from an episode of regulatory threat in the credit card market the data show that the initial threat led to negative abnormal returns for a portfolio of credit card issuers consistent with the regulatory threat hypothesis price cuts announced after the threat led to abnormal returns that are significantly more positive than those following similar cuts outside the period of regulatory threat this pattern exists not only for those issuers announcing cuts but also for their rivals which suggests that the cuts reduced an industry wide threat of regulation factors that proxy for issuers exposure to and influence on the probability of regulation affect the size of these returns which provides corroborative evidence in favor of the regulatory threat hypothesis

the economic theory of regulation and trucking deregulation shifting to the state level federal deregulation of the trucking industry in 1980 created a general gain in economic welfare at the expense of the monopoly rents of powerful interests leading some scholars to ponder the limitations of the economic theory of regulation however analyzing only the federal changes excludes evidence from the significant intrastate sector of the trucking industry regulation of which remains largely unchanged from that prior to 1980 this paper argues that after a decade of clear federal policy success truckers continue to capture most state regulators sustaining monopoly rents in what would otherwise be an inherently competitive industry using data from the fifty states we demonstrate the extent to which the economic theory is in fact consistent with trucking industry evidence

cost reductions cost padding and stock market prices the chilean experience with price cap regulation we study the chilean electricity distribution industry and find that costs the ratio of reported costs to revenues have fallen since price caps were introduced cost reductions are u shaped since 1989 strong initial cost reductions reverse every four years coinciding with regulatory reviews a possible explanation is that firms are behaving strategically we then use stock market data to complement our study we construct a measure of cumulative abnormal returns for regulated firms around their quarterly announcements and a measure of naive cost expectations which excludes any indication of the occurrence of review periods in general cost reports in excess of naive cost expectations have a negative effect on returns even after we control for company fixed effects the exception is cost surprises that happen during review periods which increase abnormal returns the estimated effects fall over time this is consistent with the hypothesis of strategic firms and that the regulatory regime translates these games into higher rates in a way that is not completely anticipated by the market more generally the results suggest there may be value in complementing regulatory procedures with stock market information

spatial integration at multiple scales rice markets in madagascar the dramatic increase in the price of rice and other commodities over the past year has generated new interest in how these markets work and how they can be improved this article uses an exceptionally rich data set to test the extent to which markets in madagascar are integrated across space at different scales of analysis and to explain some of the factors that limit spatial arbitrage and price equalization within a single country we use rice price data across four quarters of 2000 2001 along with data on transportation costs and infrastructure availability for nearly 1 400 communes in madagascar to examine the extent of market integration at three different spatial scales subregional regional and national and to determine whether non integration is due to high transfer costs or lack of competition the results indicate that markets are fairly well integrated at the subregional level and that factors such as high crime rates remoteness and lack of information are among the factors limiting competition

the role of ancillary benefits on the value of agricultural soils carbon sequestration programmes evidence from a latent class approach to andalusian olive groves agriculture is a key sector for climate change mitigation strategies due to its co2 sequestration potential however in order to increase mitigation changes in current crop and land management are required which in many cases imply additional costs to farmers thus this research assesses society s willingness to pay using a discrete choice analysis for a soil management programme in andalusian olive groves identifying different groups based on preference heterogeneity we identify three groups and characterise them on the basis of socio demographics willingness to pay is higher in areas and for individuals who would directly benefit from the programme additionally the ancillary benefits associated to carbon sequestration capture an important share of the overall benefits our results show that soil carbon sequestration in olive groves provides net social value and can be a cheap and cost effective way of combating climate change

stock price effects of u s trade policy responses to japanese trading practices in semi conductors over much of the last decade the united states and japan have been embroiled in a trade dispute over access to japanese markets for semiconductors and downstream products this study examines stock price reactions for firms affected by a subset of events commencing with the filing of a section 301 petition by the u s semiconductor industry association alleging unfair practices by the japanese and culminating in the 1986 trade agreement the evidence suggests that u s semiconductor consumers as well as producers benefited from these events

the effect of wholesale market deregulation on shareholder wealth in the electric power industry abstract this paper analyzes electric utility stock price reactions to events preceding the passage of the energy policy act of 1992 a development that precipitated the onset of competition in the wholesale sector of the electric utility industry and accelerated the pace toward state level deregulation of the retail sector for the industry as a whole we find that at worst investors had neutral reactions to events preceding wholesale deregulation however stock price reactions vary systematically with differences in incumbent utilities marginal costs though not with differences in fixed costs or purchased power costs these results are consistent with the notion that new technologies have substantially reduced barriers to entry into the electric power generation industry rendering capital cost advantages of incumbent utilities vulnerable to being neutralized by new entrants however marginal cost advantages are more likely to be sustainable because they are likely to be driven by inimitable locat

using information diffusion models to estimate the impacts of regulatory events on publicly traded firms abstract analysis and evaluation of regulatory actions require inexpensive and timely information about resultant costs and benefits this paper extends the traditional event study methodology for assessing the impact of regulatory actions on the value of publicly traded firms we use diffusion theory to construct several models of how markets adjust to regulatory events ex ante preference for a particular model is based on prior knowledge about the characteristics of the regulatory event and information diffusion patterns we demonstrate the use of the methodology by applying it to an analysis of the impacts of a regulatory action taken to protect the northern spotted owl

the decline of unionization in the united states what can be learned from recent experience the dramatic decline in unionization over the last decade is investigated in the context of a supply demand model of union status determination using data from surveys of workers conducted in 1977 and 1984 along with data from the national labor relations board on representation elections it is concluded that the decline in unionization since 1977 is accounted for largely by 1 an increase in employer resistance to unionization probably due to increased product market competitiveness and 2 a decrease in demand for union representation by nonunion workers due to an increase in the satisfaction of nonunion workers with their jobs and a decline in nonunion workers beliefs that unions are able to improve wages and working conditions

imperfect competition in agricultural markets evidence from ethiopia abstract drawing upon unique transaction level data from rural ethiopia this paper tests for general forms of imperfect competition among rural wholesale traders these are key to the grain distribution system as they purchase from farmers and perform interregional trade tests show that traders in a typical source market engage in imperfectly competitive behavior in purchasing from farmers driving down the price paid to farmers approximately 3 in contrast there is no conclusive evidence of imperfect competition among traders in the larger more centrally located market studied thus efficiency losses due to market structure are likely to be greatest in markets which also have poor road links and lesser volumes of marketed grain

grain marketing regulations impact on peasant production in ethiopia abstract during the past 10 years ethiopia has established an elaborate system of trade restrictions producer quotas and fixed producer prices for purchasing a substantial proportion of peasants marketable surplus recent evidence suggests that the quotas are inequitably allocated among areas and that low fixed prices reduce farmer incomes incentives to use improved inputs and grain production regulation of marketplaces and interregional grain trade have important negative effects on consumers producers and the national economy by increasing grain prices the state can stimulate production and ensure adequate supplies of grain without the need for compulsory quotas relaxing the restrictions on marketplaces and on interregional trade can benefit farmers consumers and the national economy with few costs

standard errors in event studies even if true abnormal returns are uncorrelated estimated abnormal returns are not this paper presents a simple formula for the variance of estimated cumulative abnormal re turns both returns and dummy variable procedures for estimating the standard error correctly taking account of both intertemporal and contemporaneous correlation of esti mated residuals are discussed they are then applied to an event study of post merger performance it is shown that ignoring either the intertemporal or contemporaneous correlation of residuals can result in significant underestimates of standard errors

the effect of discretionary price control decisions on equity values abstract the macro literature presents conflicting evidence on the effects of price controls in this study the fact that the macro economic effect of wage and price controls is the aggregation of the micro economic effects is used to implement a different approach to measure the effects of price controls the effect of price controls is inferred from examining the impact of discretionary regulatory decisions on the equity values of individual firms during phase ii of nixon s economic stabilization program the empirical results indicate that violators of the regulations incurred significant abnormal losses that were unrelated to the explicit penalties this suggests that implicit penalties were imposed on offending firms the analysis of price increase decisions provides weak evidence that these price commission decisions had an impact on equity values

studying firm specific effects of regulation with stock market data an application to oil price regulation regulations are often introduced and reformed in response to unanticipated changes in market forces in late 1973 for example opec quadrupled the world price of oil and u s policy makers responded by imposing oil price regulation such events pose a fundamental problem of interpretation for studies that use stock prices to identify the economic effects of regulation what portion of the capital gains or losses experienced by investors in regulated firms is due to regulation and what portion is due to unanticipated economic events to answer these questions we use microeconomic theory to derive hypotheses about how the capital gains and losses created by opec pricing and u s regulatory policies are related to the underlying characteristics of petroleum firms we test the hypotheses by including a model of firm specific abnormal returns in the standard market models of common stock returns earned by investors in petroleum firms the results indicate the u s oil production and refiner access to price controlled crude oil were sources of capital gains and that u s and foreign refining were sources of capital losses

expected product market reforms and technology adoption by senegalese onion producers author s bernard t de janvry a mbaye s sadoulet e abstract the authors 2017 we assess the responsiveness of senegalese onion producers to their knowledge of expected changes in product market conditions whereby onions would no longer be sold based on volume but rather on weight and with labeling certifying quality a village level randomized information campaign on the upcoming introduction of these reforms induced significant investments by farmers into quality enhancing inputs delays in the actual introduction of scales enabled us to rigorously identify positive price effects from these investments our results point to the importance of farmers expectations regarding the improved functioning of product markets in triggering technology adoption

trucking deregulation and labor earnings is the union premium a compensating differential this article examines wage determination among union and nonunion truck drivers using the 96 monthly current population surveys for 1983 90 union density in the previously regulated for hire sector of the trucking industry fell from about 60 during the regulatory period of the 1970s to about 25 by 1990 union log wage premiums fell from 0 40 in the 1970s to 0 30 or below in the 1980s longitudinal estimates from multiple panels for 1983 84 through 1989 90 suggest far smaller union premiums supporting the thesis that part of the wage differential following deregulation is a compensating premium for driver quality

the incidence of regulatory rents in the motor carrier industry this article focuses on two questions in the debate over motor carrier regulation first did regulation create eliminate or have no effect on monopoly rents in the trucking industry second ifthere were rents what was their incidence were they received by owners oftrucking firms dissipated through higher costs or captured by the teamsters union data on share price responses to deregulation announcements reveal declines in expected profits of 8 19 of totalfirm value this suggests that regulation created monopoly profits and indicates that at least some of these rents accrued to owners of trucking firms firms responses to regulatory change are modelled as functions of company s operating characteristics and measures of unionization operating efficiency and service characteristics are shown to affect the impact of deregulation on share values

the effect of wage bargains on the stock market value of the firm the author estimates the change in the value of common stock resulting from an unexpected change in collectively bargained labor costs using bargaining unit wage data and nyse stock returns he estimates a dollar for dollar trade off between these variables this result is consistent with stock valuations based on present value maximizing managerial decisions that is the results are consistent with hotelling s lemma the author also finds support for the hypothesis that collective bargains maximize the sum of shareholder and union member wealth that is the results are consistent with strong efficiency in the contracting environment copyright 1989 by american economic association

the rise and fall of railtrack plc an event study forming railtrack was a key part of the privatization of british rail br railtrack took over the ownership of br s fixed infrastructure in april 1994 and its parent company the railtrack group was floated in may 1996 on the london stock exchange lse despite the group posting some excellent financial results in the early years railtrack s record on infrastructure improvement and safety was frequently criticized this apparent inconsistency between shareholder interests and public service obligations culminated in railtrack being placed in administration in october 2001 in view of this apparent inconsistency and the high court claim for additional compensation brought against the government by a group of 49 000 small investors the reaction of the stock market to 19 key events is modelled among other things we find when railtrack announced after the fatal derailment of a high speed train near the hertfordshire town of hatfield that there would be a 6 month programme of emergency track repairs t

trade liberalization comparative advantage and scale economies stock market evidence from canada abstract the canada united states free trade agreement fta provides an excellent opportunity to analyze the impact of a comprehensive trade liberalization in this paper a stock market event study is employed to capture investors expectations about the consequences of this agreement for manufacturing firms in canada the primary question addressed is whether abnormal stock market returns corresponding to news about the fta are consistent with hypotheses based on comparative advantage and economies of scale the results indicate that both comparative advantage and scale economies played a role in determining investors perceptions of the impact of the fta

the inefficiency of regulating a competitive industry productivity gains in trucking following reform this study confirms the higher productivity levels predicted by advocates of regulatory reform in trucking and shows that these gains have been substantial cost simulations suggest that following a year of higher expenditures efforts to remain competitive have yielded considerable cost savings that increase over time from 1 percent in 1981 to 23 percent in 1984 the indirect effects of reform through the independent variables initially decrease costs but later lead to higher costs the cumulative effect has been a less than 1 percent increase in costs in 1980 becoming by 1984 a significant 16 percent productivity gain copyright 1990 by mit press

motor carrier deregulation and highway safety an empirical analysis the passage of the motor carrier reform and modernization act of 1980 mca 1980 effectively marked the end of rate and entry regulation in the interstate trucking industry and most economists agree that this legislation has created many important economic benefits during the 1980s for example shipping rates fell in real terms service expanded and improved in quality and generally resources were used more efficiently there is increasing concern however that deregulation has led firms to reduce safety expenditures in order to remain competitive and that trucking accidents and fatalities have increased as a consequence 4 9 indeed brock adams former u s secretary of transportation claims that trucking accidents have increased since 1980 for this very reason 2 the limited empirical evidence reported in the literature suggests otherwise moore 17 for example shows that accident fatality and injury rates have fallen since 1980 despite the rapid increase in the number of truck miles traveled 13 his analysis however is based on a comparison of rates across time and does not reveal any of the potential economic or institutional forces that may be affecting the evolution of these data in a more systematic analysis traynor 22 finds that deregulation has reduced accident rates in california although it may be difficult to extend his results to the national experience as a whole this paper has two major objectives the first is to estimate an empirical model using a pooled cross section of state data to determine whether the evidence traynor 22 reports for california holds in general for all other states the second objective is to determine empirically those factors that may be driving the results in moore 17 pooling these data allow us to test

compensation unionization and deregulation in the motor carrier industry abstract previous research on the deregulation of the motor carrier industry has concluded that firms have become more efficient under deregulation and that costs have fallen largely at the expense of labor most studies that examine the effects on labor use current population survey data and find that wage premiums to union labor have fallen as a result of deregulation this study uses firm data and finds that deregulation had a very small effect on the average compensation paid by surviving union firms for nonunion firms the impact of deregulation is much larger these results suggest that the compensation premium for the labor of surviving union firms has increased but this increase applies only to surviving union labor in the paper we also point to and note a major exodus of union firms with the result that union labor levels have fallen and fallen dramatically