uncertainty investment and industry evolution we study the effects of aggregate and idiosyncratic uncertainty on the entry of firms total investment and prices in a competitive industry with irreversible investment we first use standard dynamic programming methods to determine firms entry decisions and we describe the resulting industry equilibrium and its characteristics emphasizing the effects of different sources of uncertainty we then show how the conditional distribution of prices can be used as an alternative means of determining and understanding the behavior of firms and the resulting industry equilibrium finally we use four digit u s manufacturing data to examine some implications of the model

bounded price variation and rational expectations in endogenous switching model of the u s corn market a model that includes bounded price variation and rational expectations by producers is estimated for the u s corn market the resulting model specification is highly nonlinear though since the probability of market equilibrium must be determined endogenously unlike previous research the cross equation restrictions implied by the rational expectations hypothesis are incorporated in the bounded prices model by using fair and taylor s 1983 procedure for obtaining maximum likelihood estimates of nonlinear rational expectations models the resulting model is compared against a standard equilibrium model with naive expectations the results show the bounded prices model is a superior specification copyright 1989 by mit press

rational versus adaptive expectations in present value models using data on stock price and dividends and on long term and short term interest rates we test an important implication of present value models that current value is a linear function of the conditional expectations of the next period value and the current determining variable this implication combined with rational expectations re is strongly rejected combined with adaptive expectations ae it is accepted the latter model can also explain the observed negative relation between the rate of return and stock price thus the re assumption should be used with caution the ae assumption may be useful in econometric practice

inventories and the concentration of suppliers and customers evidence from the chinese manufacturing sector this study investigates the links between supplier and customer base concentrations and inventory holdings in the chinese manufacturing sector using financial data from a cohort of 516 companies we find that firms that face higher supplier density benefiting from better co ordination with suppliers hold fewer inventories whereas firms with higher customer density retain larger inventories as a result of the bargaining power exercised by customers we then extend the analysis by investigating the impact of account payables receivables and bad debt reserves finding that inventory holdings are positively associated with the two forms of financing and negatively associated with bad debts this last relationship however becomes less severe when firms have access to large volumes of payables finally we show that the above results hold with varying degrees of similarity also when we partition the dataset into six homogenous industrial segments overall this study contributes to the growing literature on inventories and the structure of the supply chain by shedding new light on the importance of both supplier and customer densities as well as the volume of payables and receivables for inventory management

is the investment uncertainty relationship nonlinear an empirical analysis for the netherlands we examine the investment uncertainty relationship for a panel of dutch non financial firms the system generalized method of moments gmm estimates suggest that the effect of uncertainty on investment is nonlinear for low levels of uncertainty an increase in uncertainty has a positive effect on investment while for high levels of uncertainty an increase in uncertainty lowers investment this result is in line with a number of theoretical studies but has never been documented empirically

product market competition and the impact of price uncertainty on investment some evidence from us manufacturing industries the authors estimate the impact of price uncertainty on investment using a panel of u s manufacturing industries pooling the data for all industries uncertainty has no impact on current investment however for industries that have low levels of seller concentration and thus are likely to be highly competitive the estimated impact is negative and statistically significant while for industries with high levels of seller concentration the impact is always small and not significantly different from zero the finding of a negative relationship between investment and price uncertainty in competitive industries is broadly consistent with models that incorporate irreversibility of capital investment copyright 1996 by blackwell publishing ltd

on the investment sensitivity of debt under uncertainty abstract we investigate the impact of debt on a panel of u s manufacturing firms capital investment behavior as the underlying firm specific and market level uncertainty changes our estimates show that the influence of leverage on capital investment may be stimulating or mitigating depending on the effects of uncertainty

uncertainty in sales and inventory behaviour in the u s trade sectors this paper investigates uncertainty in sales and inventory behavior for the u s wholesale and retail trade sectors first using a vector error correction model with garch m the authors find that the uncertainty measured by forecast error variance in sales does not affect inventory behavior in both trade sectors second using forecast error variance decomposition and estimated permanent components they observe that the uncertainty may be attributed more to demand shocks than to cost shocks

a dynamic model of investment in the u s beef cattle industry reproduction constraints lead to some a priori information that may prove valuable in econo metrically modeling inventory dynamics within the u s cattle herd the distributed lag models estimated for animal inventories suggest an implicit incorporation of the age distribution of the herd that is crucial to understanding the retention culling investment decisions the estimated equations are validated using post sample observations that were withheld prior to estimation the final form dynamic equations have complex roots and protracted price and investment effects the parameter estimates are used to calculate intermediate and long run elasticities at the means of relevant variables

inventories sales uncertainty and financial strength abstract we investigate the empirical linkages between sales uncertainty and firms inventory investment behavior while controlling for firms financial strength using large panels of manufacturing firms from several european countries we find that higher sales uncertainty leads to larger stocks of inventories we also identify an indirect effect of sales uncertainty on inventory accumulation through the financial strength of firms our results provide evidence that financial strength mitigates the adverse effects of uncertainty

expectation calculation and macroeconomic dynamics the authors establish a framework wherein agents make expectation revision decisions subject to a specified calculation technology and preferences over forecast errors the technology endows agents with correctly specified economic models but the cost of expectation calculation using these models leads to gradual and incomplete adjustment to long run rational expectation equilibrium the rational expectations hypothesis emerges as a special case of the equilibrium paths obtained in the authors framework in a natural rate model of monetary policy calculation technology gives rise to long run nonneutrality and hysteresis effects and incomplete adjustment of forecast rules causes output fluctuations to be amplified copyright 1992 by american economic association

investment and disinvestment principles with nonconstant prices and varying firm size applied to beef breeding herds variable beef breeding herd sizes are found to be optimal given cyclical beef prices traditional replacement theory does not allow variable firm size because unequal investment replacement and disinvestment culling rates are not possible if firm size changes cost of production per unit endogenously changes given a u shaped cost curve optimal investment and disinvestment rules for variable firm size are developed based upon the firm s cost curve and discounted net revenue flows for a finite rolling planning horizon current and future investment and disinvestment decisions are linked by their mutual effect on firm size and hence production cost per unit

uncertainty and the employment dynamics of small and large businesses we examine the impact of uncertainty on employment dynamics alternative measures of uncertainty are constructed based on the survey of professional forecasters and regression based forecasting models for gdp growth inflation sp the impact on large businesses are generally non existent or weaker our results suggest that to truly understand the effects of uncertainty on employment dynamics we need to focus on the relatively smaller and entrepreneurial businesses we discuss implications for the framing of economic policy

the resurgence of inventory research what have we learned abstract recent empirical and theoretical research on business inventories is surveyed and critically evaluated while most inventory research has had macroeconomic motivations we focus on its microtheoretic basis and on potential conflicts between theory and evidence the paper asks two principal questions first how can inventories which are allegedly used by firms to stabilize production nonetheless be a destabilizing factor at the macroeconomic level second why if firms are following the production smoothing model is production more variable than sales in many industries we suggest that the so called s s model may help answer both questions

beyond microfoundations towards a not too rational macroeconomics at ucla we are establishing a center for computable economics i have been very much involved in this effort this may surprise you that a non mathematical macro monetary economist should become an enthusiast for this project is one of those things that do not compute but then as i will explain we take a special interest in things that do not compute one may come to computable economics by many intellectual routes i will trace my own not because it makes a particularly edifying story but because it will tell you what kind of problems i hope we can make progress on by developing the field of computable economics but before we get to that i had better explain what i mean by computable economics

investment cash flow sensitivity cannot be a good measure of financial constraints evidence from the time series abstract investment cash flow sensitivity has declined and disappeared even during the 2007 2009 credit crunch if one believes that financial constraints have not disappeared then investment cash flow sensitivity cannot be a good measure of financial constraints the decline and disappearance are robust to considerations of r d and cash reserves and across groups of firms the information content in cash flow regarding investment opportunities has declined but measurement error in tobin s q does not completely explain the patterns in investment cash flow sensitivity the decline and disappearance cannot be explained by changes in sample composition corporate governance or market power and remain a puzzle

micro economic models of beef supply a series of micro economic models of cow calf and feedlot operators is developed in an effort to isolate factors important in beef supply slight changes in behavioural assumptions are shown to imply qualitatively different comparative static reactions on the part of these cattlemen some empirical examples of the feedlot operator are presented based upon an estimated weight gain function modeles microeconomiques d offre de boeuf l auteur developpe une serie de modeles microeconomiques du comportement des producteurs de veaux et des engraisseurs de betail afin d identifier les facteurs les plus importants dans la definition de l offre de boeuf des variations minimes dans le comportement presume se traduisent par des reactions qualitativement differentes des producteurs de betail en statique comparative on presente quelques exemples empiriques du comportement de l engraisseur a partir d une fonction calibree de gains de poids

emissions in the platinum age the implications of rapid development for climate change mitigation rapid global economic growth centred in asia but now spread across the world is driving rapid greenhouse gas emissions growth making earlier projections unrealistic this paper develops new illustrative business as usual projections for carbon dioxide co2 from fossil fuels and other sources and for non co2 greenhouse gases making adjustments to 2007 world energy outlook projections to reflect more fully recent trends we project annual emissions by 2030 to be almost double current volumes 11 per cent higher than in the most pessimistic scenario developed by the intergovernmental panel on climate change ipcc and at a level reached only in 2050 in the business as usual scenario used by the stern review this has major implications for the global approach to climate change mitigation the required effort is much larger than implicit in the ipcc data informing the current international climate negotiations large cuts in developed country emissions will be required and significant deviations from baselines will be required in developing countries by 2020 it is hard to see how the required cuts could be achieved without all major developing as well as developed countries adopting economy wide policies

an econometric model of cattle inventories dynamic regression equations are estimated for each beef cattle breeding herd and beef cattle inventories at two levels of aggregation the u s and montana the analysis for montana was utilized as a guide for specification of the national equation to reduce the inference problem associated with letting the sample data help specify the model rational lags on average price received by farmers for calves and the ratio of fed beef to corn prices at omaha constitute the primary explanatory variables the equations perform exceedingly well over the sample period 1950 80 and in post sample forecasts with the sample truncated back to 1970

an indirect test for the specification of expectation regimes this paper develops an empirical strategy for testi ng competing hypotheses of expectation regimes when direct measures of expectati ons are unavailable the procedure takes as given an assumed structural relation ship between expected values of exogeneous variables and a given decision variab le by imposing different expectation regimes on this model the authors obtain an artificial nesting of the hypothesized regimes which allows us to test whethe r any specification dominates this methodology is extended to multipleequation applications with any number of hypothesized expectation regimes the tests are illustrated using a model of the response of county level farm acreage allocati on to expected commodity prices copyright 1986 by mit press

financing constraints and inventory investment a comparative study with high frequency panel data this study provides new evidence of the importance of financing constraints for explaining the dramatic cycles in inventory investment we compare the empirical performance of different financial variables coverage ratio cash stocks and cash flow used in previous research to test for the presence of financing constraints the comparison is undertaken in a common framework with an identical sample and high frequency quarterly firm panel data cash flow is much more successful than cash stocks or coverage in explaining the facts about inventory investment across firm size different inventory cycles and different manufacturing sectors

testing the rational expectations hypothesis in an agricultural market a recent survey on models of agricultural supply equations listed over 500 studies in which variants of nerlove s adaptive expectations model were employed one might naively assume that the scientific evidence overwhelmingly favored the adaptive expectations hypothesis but this inference would not be warranted in particular there have been very few studies which have even attempted to estimate a rational expectations version of the traditional agricultural supply models and none that have explicitly tested the rational expectations hypothesis 2 in this paper we estimate a model of agricultural supply and demand for the chicken broiler industry under the maintained assumption of rational expectations in the sense of muth 1961 and provide a series of tests of the model specification we find that in this case the hypothesis of muth rationality receives strong support in recent years there has been increasing interest in models in which economic actors are assumed to form expectations of variables rationally for the most part empirical applications of the rational expectations hypothesis have employed single equation econometric methods these methods have permitted consistent estimation of equations under the assumption of the rational expectations hypothesis but do not allow for any explicit testing of the maintained hypothesis of rationality this paper presents estimates of a simultaneous equation model of the chicken broiler industry using maximum likelihood methods and provides a joint test of the rational expectations hypothesis and the model specification our econometric procedure is related to the recent theoretical work of wallis 1980 and combines time series analysis with traditional econometric estimation techniques under the assumption of rational expectations the model can be solved for the expected price as a function of the expected values of the exogenous variables this function can then be substituted into the model leading to a specification which contains the original endogenous and exogenous variables plus the expected values of the exogenous variables in general following this substitution the model will contain overidentifying restrictions time series analysis is utilized to generate the necessary forecasts of the exogenous variables the complete system of equations is estimated by full information maximum likelihood and the constraints are tested by a log likelihood ratio test the overidentifying constraints arise in the model because the suppliers are assumed to act as if they know both the underlying structure of the model and the stochastic processes governing the exogenous variables the two requirements of rational expectations while the expected price enters only the supply equation of our model it is necessary in the econometric formulation to specify the demand equation the instrumental variable procedures of mccallum 1976 and nelson 1975b are single equation methods and do not permit a test of the rational expectations hypothesis by specifying the complete model the additional structure imposed on the problem allows us to estimate the coefficients and test the implied restrictions there has not been universal agreement that the rational expectations hypothesis is the best theoretical device to model rational behavior according to muth s original formulation economic actors forecast endogenous variables according to the true reduced form equations of the model decanio 1979 and friedman 1979 have argued that the economic actors actually received for publication august 24 1981 revision accepted for publication march 2 1982 university of new mexico and university of california davis respectively we wish to thank g king r l huntzinger r pope and l wegge for advice on this project a nelson and e shaw contributed useful research assistance i the paper by askari and cummings 1977 provides references for these studies 2 huntzinger s 1979 paper is one of the first attempts at estimatitng a rational expectations model of agricultural supply

credit channel trade credit channel and inventory investment evidence from a panel of uk firms abstract in this paper we use a panel of 609 uk firms over the period 1980 2000 to test for the existence of a trade credit channel of transmission of monetary policy and for whether this channel plays an offsetting effect on the traditional credit channel we estimate error correction inventory investment equations augmented with the coverage ratio and the trade credit to assets ratio differentiating the effects of the latter variables across firms more or less likely to face financing constraints and firms making a high or low use of trade credit our results suggest that both the credit and the trade credit channels operate in the uk and that the latter channel tends to weaken the former

financial pressure monetary policy effects and inventories firm level evidence from a market based and a bank based financial system this paper examines the adjustment of inventories by firms in the united kingdom and spain which have two quite different financial systems a widely held view is that a key channel for monetary policy is through the influencing of inventory accumulation using a large company level panel data set for both countries significant effects associated with borrowing costs on inventories are estimated financial effects associated with liquidity and the borrowing ratio are estimated to be stronger in the uk than in spain since the spanish financial system is bank based while that of the uk is market based this is interpreted as contrary to the bank dependence hypothesis

on information and market dynamics the case of the u s beef market abstract the paper investigates the nature of dynamic prices and expectations in a competitive market the approach is applied to the u s beef market which exhibits cyclical patterns and significant biological lags in the production process beef price equations are estimated under different expectation regimes the empirical results indicate the presence of heterogeneous price expectations with a significant number of market participants neglecting information about the existence of a beef cycle

international comparisons of cattle cycles the time series properties of cattle production in three countries with different technologies argentina the united states and uruguay are studied in order to shed light on the role of technology in the dynamics of the cattle sector four series are analyzed for each country slaughter price stock of cows and total herd spectral decomposition of the time series shows the existence of cycles having surprising regularity for all the four time series the three countries exhibit very similar cyclicities in spite of their different technologies and economic environment

volatility of sales expectation errors and inventory investment firm level evidence abstract this paper tests whether demand uncertainty which is measured by the volatility of sales affects inventory investment based on the accelerator buffer stock inventory model using a panel of dutch listed firms in the period 1984 1996 we find that the estimated coefficient of the speed parameter of adjusting inventories increases vastly when the volatility of sales is used as the proxy for unexpected sales in the stock adjustment equation dutch firms on average overstate future sales leading firms to accumulate inventories partially due to the concern of avoiding stock out in case of highly unexpected demand

corporate trade credit and inventories new evidence of a trade off from accounts payable and receivable abstract trade credit is an important source of finance for firms and has been well researched but the focus has been on financial trade offs in this paper we consider the trade offs with inventories and develop a simple model that recognizes the incentives a firm faces to offer and receive trade credit our model identifies the response of accounts payable and accounts receivable to changes in the cost of inventories profitability risk and liquidity and importantly this influence operates through a production channel our results support the model and complement many existing studies focused on explaining the financial terms of trade credit