excise taxes with multiproduct transactions i examine excise taxes levied on multiproduct retailers excise taxes reduce equilibrium output and decrease equilibrium product variety in the short run but taxes can raise output per product in the long run and induce entry excise taxes are overshifted into prices in a wide range of cases including under linear and concave demand conditions and excise taxes shift less than one for one into prices only when demand is highly convex multiproduct transactions substantively alter the efficiency of ad valorem and specific forms of excise taxes and affect the comparison of relative tax performance over short run and long run time horizons jel h25 h32 l11 l13 l81

do mergers increase product variety evidence from radio broadcasting mergers can reduce costs and alter incentives about how to position products so that theory alone cannot predict whether mergers will increase product variety we document the effect of mergers on variety by exploiting the natural experiment provided by the1996 telecommunications act we find that consolidation reduced station entry and increased the number of formats available relative to the number of stations we find some evidence that increased concentration increases variety absolutely based on the programming overlap of jointly owned stations we can infer that the effects operate through product crowding that is consistent with spatial preemption

do switching costs make markets less competitive abstract the conventional wisdom in economic theory holds that switching costs make markets less competitive this article challenges this claim the authors formulate an empirically realistic model of dynamic price competition that allows for differentiated products and imperfect lock in they calibrate this model with data from frequently purchased packaged goods markets these data are ideal in the sense that they have the necessary variation to identify switching costs separately from consumer heterogeneity equally important consumers exhibit inertia in their brand choices a form of psychological switching cost this makes the results applicable to the broad range of products that are distinctly identified i e branded rather than just to products for which there is a product adoption cost or explicit switching fee in the simulations prices are as much as 18 lower with than without switching costs more important equilibrium prices do not increase even in the presence of switching costs that

theoretical analysis regarding a zero lower bound on nominal interest rates this paper explores several issues concerning a possible zero lower bound zlb including its theoretical rationale the magnitude of effects of low sustained inflation on real interest rates the validity of analyzing monetary policy in models with no monetary variables and the dynamic stabilizing properties of taylor rules in a zlb context the most important argument however is that if the short nominal rate is immobilized at zero there nevertheless exists a route for monetary stabilization policy to be effective via the foreign exchange market its quantitative importance is examined in a calibrated optimizing open economy model

exchange rate policy and the zero bound on nominal interest rates in this paper we study the effectiveness of monetary policy in a severe recession and deflation when nominal interest rates are bounded at zero we compare two alternative proposals for ameliorating the effect of the zero bound an exchange rate peg and price level targeting we conduct this quantitative comparison in an empirical macroeconometric model of japan the united states and the euro area furthermore we use a stylized micro founded two country model to check our qualitative findings we find that both proposals succeed in generating inflationary expectations and work almost equally well under full credibility of monetary policy however price level targeting may be less effective under imperfect credibility because the announced price level target path is not directly observable

monetary policy when interest rates are bounded at zero this paper assesses the importance of the zero lower bound on nominal interest rates for the interest rate channel of monetary policy we simulate several interest rate setting policy rules with ei

industrialization and consolidation in the u s food sector implications for competition and welfare good sources for information on recent developments in food market structure include barkema drabenstott and welch u s department of agriculture 1996b and rogers my objective is not to add to this literature but rather to consider what we have learned as a profession about the rapid consolidation in food processing and distribution what are its implications for market power economic efficiency and the distribution of economic welfare among producers consumers and marketers

money and credit as means of payment abstract a stochastic economic environment is presented in which the mix of cash and resource costly credit used as means of payment is endogenous for reasonable values of the credit cost parameter velocity can be quite variable and sensitive to the nominal interest rate those parameter values also generate larger welfare costs of inflation than have been found previously and a sizable impact of inflation on real interest rates

stagnation income distribution and the agrarian constraint a note through an accelerator effect a problem with the model is that it ignores completely a very important feature of less developed economies like india namely the agricultural sector the model considered production under oligopolistic conditions with firms holding an excess capacity of capital while this may be an accurate depiction of the industrial sector it is totally inaccurate for an agricultural sector with many peasant farms and where output seems to be constrained by factors other than effective demand it is therefore necessary to re examine the issue of the relation between distribution and growth by making explicit allowance for a separate agricultural sector in the model it may be argued that the existence of the agricultural sector invalidates the positive relation between income equality and growth kumar 1989 for example has claimed that the slow growth of the agricultural sector rather than the problem of effective demand caused by the high degree of monopoly power is the constraint on indian growth this can be taken to mean that since growth in agriculture achieved by the relaxation of

innovation and the evolution of market structure this paper examines the association between innovation and the evolution of market structure a dynamic model of market concentration is applied to seventy three u k industries 1970 79 and the results are found to be consistent with the hypothesis that innovation is deconcentrating the results reported here and those contained in earlier work combine to suggest that innovation and changes in market concentration interact in a relatively rapid mutually reinforcing but rather weak spiral of increased innovation and decreasing concentration copyright 1990 by blackwell publishing ltd

on money as a medium of exchange we analyze economies in which individuals specialize in consumption and production and meet randomly over time in a way that implies that trade must be bilateral and quid pro quo nash equilibria in trading strategies are characterized certain goods emerge endogenously as media of exchange or commodity money depending both on their intrinsic properties and on extrinsic beliefs there are also equilibria with genuine fiat currency circulating as the general medium of exchange we find that equilibria are not generally pareto optimal and that introducing fiat currency into a commodity money economy may unambiguously improve welfare velocity acceptability and liquidity are discussed

mcis and monetary policy abstract several central banks have recently adopted a monetary conditions index mci to guide monetary policy under floating exchange rates this paper discusses some analytical and practical questions raised by mcis furthermore using data for australia canada and new zealand which all operate monetary policy under floating rates and with an inflation target it estimates the responses of the central banks to exchange rate changes the results reveal clear differences between central banks while the reserve bank of australia does not appear to respond the bank of canada and the reserve bank of new zealand who use the mci as an operating target do respond quite strongly to movements in the exchange rate

excess entry vertical integration and welfare this article provides a systematic analysis of the welfare effects of vertical integration by a monopolist input supplier into a monopolistically competitive downstream industry we give sufficient conditions on consumer preferences that lead to pareto improving vertical integration and demonstrate a close relationship between assumptions on preference for variety excess entry in monopolistically competitive markets and the welfare effects of vertical integration excess entry in downstream markets tends to give rise to pareto improving vertical integration we extend the analysis to vertical oligopoly and access price regulation

concentration product variety and entry for merger evidence from new product introductions in the u s food industry competing theories in industrial organization predict that more concentrated industries will lead to a smaller and more efficient variety of products or alternately a larger and less efficient array of products this paper presents an empirical study of these competing implications that estimates the impact of market concentration on new product introductions in a panel of nine food processing industries over 1983 to 2004 controlling for industry level unobservables using fixed effects and endogeneity of industry market structure we find that industry concentration promotes the introduction of new products preliminary evidence also suggests that new product introductions spur subsequent food industry mergers both conclusions are consistent with the entry for merger theory of product variety wherein small firms introduce new products in anticipation of profitable future mergers with concentrated firms

fixes of the forward discount puzzle regressions of ex post changes in floating exchange rates on appropriate interest differentials typically imply that the high interest rate currency tends to appreciate the forward discount puzzle using data from the european monetary system ems the authors find that a large part of the forward discount puzzle vanishes for regimes of fixed exchange rates that is deviations from uncovered interest parity appear to vary in a way that is dependent upon the exchange rate regime by using the many ems realignments the authors are also able to quantify the peso problem copyright 1996 by mit press

the economics of product variety a survey demand for variety may arise from a taste for diversity in individual consumption and or from diversity in tastes even when each consumer chooses a single variant the full degree of variety potentially demanded will not in general be supplied because scale economies even to a small degree mean that the potential welfare or revenue gain from greater variety must be balanced against the lower unit production costs with fewer variants the economics of product variety consists essentially in analysing the effect of this balance in different situations and comparing the degree of product variety for different market structures with each other and with the optimum the survey commences with the work on market structures with single product firms generalized monopolistic competition tracing modern developments in both the chamberlinian and hotelling traditions the latter has been particularly fruitful due to the expansion of the original locational ideas into virtual spaces in product characteristics the emphasis in recent work on product variety has been on multiproduct firms in both monopolistic and oligopolistic structures including strategic market preemption although most work has been in a full information context there have been advances in product variety under imperfect information either by consumers to properties of the firms products or firms as to consumers demands

distribution and growth reconsidered empirical results for six oecd countries we analyse the relationship between functional income distribution and economic growth in austria france germany the netherlands the uk and the usa from 1960 until 2005 the analysis is based on a demand driven distribution and growth model for an open economy inspired by bhaduri and marglin which allows for either profit or wage led growth we find that growth in france germany the uk and the usa has been wage led whereas austria and the netherlands have been profit led in the case of austria a domestically wage led economy changes to profit led when including the effect of distribution on external trade the netherlands however are already profit led without external trade our results so far only partially confirm bhaduri and marglin s theoretical conclusion that wage led growth becomes less feasible when the effects of distribution on foreign trade are taken into account

sluggish inflation and optimizing models of the business cycle abstract many researchers have added sticky prices to quantitative business cycle models i simulate several of these models in order to evaluate their success at reproducing two features of us data the lagged reaction of inflation to monetary growth and the persistence of inflation

inflation unemployment and distributional conflict in argentina 1984 90 the cycle of various economic stabilisation efforts in argentina during the 1980s has often been characterised as reflecting either policy confusion on the part of officials or their unwillingness to depart from an obsolete model of economic development hence according to some the alternation between orthodox and heterodox policy approaches has revealed an absence of either economic policy wisdom or political conviction less attention has been paid to the underlying real class based conflict for income that has manifested itself in terms of high rates of inflation and at times hyperinflation interpreting the issue from this perspective allows us to appreciate the essential continuity of the process of neo liberal reform of the argentine political economy that commenced with the post peronist military coup in 1976 and has more recently culminated with the rise of the nominally peronist regime of carlos menem

alternative closures again a comment on growth distribution and inflation marglin 1984a b has recently made a most valuable contribution to the study of econ omic growth and income distribution by showing that the neoclassical neo keynesian and neo marxian approaches can be interpreted as providing alternative rules which close an underdetermined system comprising a production equation and a price equation this exercise provides simple models illustrating the essence of each tradition and allows easy comparison to be made between them however a problem with the exercise of which marglin is aware is that those partial to particular traditions may find his reading of the essence of their approach to be inadequate some of those who may loosely be identified as belonging to the neo marxian and neo keynesian tradition in particular will find some central elements of their theories having no place in marglin s models perhaps the most important concerns the possible stimulative effects of greater income equality on growth a higher real wage could increase the level of consumption in the economy increase effective demand induce firms to invest more and raise the rate of growth of the economy 1 such a story cannot be told by marglin s models in which the relationship between growth measured by the rate of growth of output and income distribution measured by the real wage is inverse criticisms of this type may imply that there may be problems inherent in marglin s comparative method or in the way his exercise is conducted i shall argue that the latter is the case and suggest how it can be rectified without damaging the nature of the exercise the problem lies in marglin s slipping in without acknowledgement strong econ omic asumption in his underdetermined model which supposedly has minimal economic

money s role in the monetary business cycle a small structural model of the monetary business cycle implies that real money balances enter into a correctly specified forward looking is curve if and only if they enter into a correctly specified forward looking phillips curve the model also implies that empirical measures of real balances must be adjusted for shifts in money demand to accurately isolate and quantify the dynamic effects of money on output and inflation maximum likelihood estimates of the modelos parameters take both these considerations into account but still suggest that money plays a minimal role in the monetary business cycle

a test of perfect substitutability in the foreign exchange market i motivations for the test the question of whether or not domestic bonds are perfect substitutes for foreign bonds in investors portfolios implying that the expected rates of returns must be equalized across currencies is an important one for two reasons the question is crucial first for choosing among various asset market models of exchange rate determination and second for evaluating tests of efficiency in the forward exchange market to illuminate the first motivation a brief discussion of models of exchange rate determination is necessary all asset market models share the assumption that there are no significant transactions costs capital controls or other impediments to the international flow of capital thus actual portfolios adjust instantaneously to equal desired portfolios this implies for example covered interest parity the domestic interest rate should differ from the foreign interest rate by an amount exactly equal to the forward discount rate perfect substitutability between domestic and foreign bonds is the stronger assumption that market participants are indifferent as to the currency composition of their portfolio it implies uncovered interest parity the domestic interest rate must differ from the foreign interest rate by an amount exactly equal to the expected rate of depreciation the perfect substitutability assumption is far from standard in fact exchange rate models within the asset market view can be classified into those that belong to the monetary approach defined by the assumption of perfect substitutability and those that belong to the portfolio balance approach defined by the assumption of imperfect substitutability in the portfolio balance approach investors hold well defined proportions of their wealth in the form of each country s assets with the proportions depending on the expected rates of return as in equation 1

distribution aggregate demand and productivity growth theory and empirical results for six oecd countries based on a post kaleckian model empirical research based on the bhaduri marglin variant of the kaleckian model has recently shown that aggregate demand in many medium sized and large open economies tends to be wage led in the medium to long run even in a period of increasing globalisation in this paper we extend this type of analysis and integrate the effects on productivity growth theoretically and empirically productivity growth is introduced into the theoretical model making use of the verdoorn effect or of kaldor s technical progress function and hence of a positive relationship between gdp or capital stock growth and productivity growth further on a cost push or marx hicks effect and hence a positive impact of real wage growth or the wage share on productivity growth is taken into account in the empirical part we estimate productivity growth equations for six countries introducing these two effects finally economic policy conclusions are drawn

small firm entry in us manufacturing a cross section empirical analysis examining the entry behavior of small firms is provided in this paper while the authors find that certain traditional market structure characteristics and entry barriers have a strong impact on small firm entry behavior the reliance upon innovative strategy by small firms also explains a significant amount of the variation in the pattern of entry by small firms they conclude that small firm entry is at least partially determined by entry barriers industry specific characteristics facilitating retaliatory conduct by incumbent firms and the reliance upon innovative strategy by small firms copyright 1989 by the london school of economics and political science

macroeconomics without the lm curve an alternative view this paper develops a fully articulated post keynesian alternative to the new consensus macroeconomic model based on explicitly post keynesian hypotheses about the inflation process the income generating process and the appropriate conduct of monetary policy the paper demonstrates how the equilibrium configuration of this model can be manipulated by non monetary policy interventions including fiscal policy and incomes policy one perhaps surprising result that emerges from the analysis is that in the context of the proper policy environment inflation targeting can have a positive impact on real economic performance

empirical analysis of the exchange rate channel in japan abstract this paper analyzes the significance of the exchange rate channel one of the transmission mechanisms of monetary policy it is important to evaluate this channel for japan because yen depreciation has been proposed as a policy to move the economy out of a liquidity trap our results suggest that in the past monetary expansion resulted in yen depreciation in the long and short run however there is no evidence to support the view that yen depreciation facilitated economic growth therefore we conclude that use of the exchange rate as a mechanism to boost the real economy was in our sample period at least premature

entry deterrence by non horizontal merger we study when and how pure non horizontal mergers whether cross product or vertical can deter new entry organizational mergers implicitly commit firms to more aggressive price competition because heightened competition deters entry mergers can occur in equilibrium even when absent entry considerations they do not we show that in order to prevent a flood of entrants mergers arise even when a marginal merger costs incumbent firms more than does a marginal entrant

money credit and wages in hyperinflation post world war i germany an important feature of the german hyperinflation is the way in which accelerating monetization of both government and private debt by the reichsbank fueled the inflation process the stimulus to private credit demand arising from more rapid adjustment of money wages over this period is often ignored however the present empirical results strongly support the importance of wage pressures in augmenting fiscal influences on nominal money growth during 1920 1923 our findings also suggest that wage claims provided the main conduit through which higher inflationary expectations were accommodated by faster rates of monetary expansion

have we underestimated the likelihood and severity of zero lower bound events prior to the financial crisis most economists probably did not view the zero lower bound zlb as a major problem for central banks using a range of structural and statistical models we find that previous research understated the zlb threat by ignoring uncertainty about model parameters and latent variables focusing too much on the great moderation experience and relying on structural models whose dynamics cannot generate sustained zlb episodes our analysis also suggests that the federal reserve s asset purchases while materially improving macroeconomic conditions did not prevent the zlb constraint from having first order adverse effects on real activity and inflation