interest rates and money in the measurement of monetary policy over the last 25 years a set of influential studies has placed interest rates at the heart of analyses that interpret and evaluate monetary policies in light of this work the federal reserve s recent policy of quantitative easing with its goal of affecting the supply of liquid assets appears to be a radical break from standard practice alternatively one could posit that the monetary aggregates when measured properly never lost their ability to explain aggregate fluctuations and for this reason represent an important omission from standard models and policy discussions in this context the new policy initiatives can be characterized simply as conventional attempts to increase money growth this view is supported by evidence that superlative divisia measures of money often help in forecasting movements in key macroeconomic variables moreover the statistical fit of a structural vector autoregression deteriorates significantly if such measures of money are excluded when identifying monetary

the demand for assets through a low interest rate environment asset demand is important in many areas of economics to investigate this we estimate a globally flexible dynamic fourier asset demand specification and calculate morishima elasticities of substit

issues in the measurement of economic depreciation introductory remarks i introduction most capital goods are used up in the process of producing output machine tools wear out trucks break down electronic equipment becomes obsolete when an asset reaches a point at which it is no longer economical to repair and maintain it is withdrawn from service as the physical deterioration and retirement of assets cause the productive capacity to decline to zero a parallel loss in asset financial value occurs this depreciation of value is a cost that must be subtracted from gross revenue in order to determine the income accruing to the asset it is also the amount that must be added to the balance sheet in order to keep wealth intact these are relatively straightforward distinctions that are routinely used in various fields of economics in studies of economic growth particularly in the new growth theory with its focus on the role of capital formation in environmental economics with its concerns about sustainable growth in production theory with the study of capital formation in industrial organization with issues involving the rate of return to capital and in public finance with its interest in the taxation of income from capital it is therefore perplexing that these important distinctions have been the source of much confusion and error it is common for example to see deterioration called depreciation though the former is a quantity concept and the latter refers to financial value other confusions have led to the inference that there are two logically separate concepts of capital one appropriate for wealth accounting and the other for the study of productivity and growth part of the problem lies with the historic confusion and controversy within capital theory itself the controversy is manifest in academic debates over the role of capital in economic growth viz the cambridge controversies in capital theory a major source of difficulty arises from the fact that by definition a capital good yields its services over the course of several years and the fact that capital goods are generally owner utilized this leads to a fundamental difference vis a vis non capital inputs like labor and materials that complicates the measurement problem enormously and necessitates the use of imputational methods and approximations to get at the underlying economic prices and quantities unlike labor which is purely an input capital goods are both inputs and outputs of the production process and this fact adds yet another dimension to the analysis in the spring of 1992 the current state of research on capital wealth and depreciation was the subject of a one day conference on research in income and wealth symposium held in washington d c at the board of governors of the federal reserve under the auspices of the national bureau of economic research this symposium ranged over many of the issues in the measurement of economic depreciation and presented both an appraisal of past research and an important set of new results the five following papers of this issue of economic inquiry are devoted to the proceedings of the workshop in the hope that further research interest will be stimulated in this crucial and under researched branch of economics ii issues in depreciation analysis given the history of confusion surrounding the concept of economic depreciation it would seem useful to precede the conference papers with a few introductory remarks about the problem of depreciation we will start with the simple example of a small manufacturing company that owns three machines one that was purchased at the beginning of the current year 1996 at a cost of 100 000 one purchased five years ago at a cost of 80 000 and one purchased twenty years ago for 40 000 the three machines are intended to perform the same set of tasks and are essentially the same except for wear and tear due to age and to design improvements that have occurred over time

less filling tastes great the realist neoliberal debate this essay examines and reformulates the realist neoliberal debate focusing initially on the issue of the attribution of goals to states we argue that not only are goals merely the epiphenomena of other things but also that their specification constitutes but a re description of strategic environments that is although an attribution of goals may contribute to our characterization of outcomes a discussion of them is not central to the development of a theory that explains and predicts the outbreak of conflict and the patterns of cooperation instead we argue that the realist neoliberal debate should be recast so that our central research agenda is the development of substantively specific models that allow us to ascertain how the equilibrium to a game in which states structure international affairs influences the types of issue specific subgames states play how countries coordinate to equilibria of different types how we can characterize the coordination problems associated with different equilibria how states can enhance the attractiveness of an equilibrium and how states can signal commitments to the strategies that are part of that equilibrium

bargaining in legislatures bargaining in legislatures is conducted according to formal rules specifying who may make proposals and how they will be decided legislative outcomes depend on those rules and on the structure of the legislature although the social choice literature provides theories about voting equilibria it does not endogenize the formation of the agenda on which the voting is based and rarely takes into account the institutional structure found in legislatures in our theory members of the legislature act noncooperatively in choosing strategies to serve their own districts explicitly taking into account the strategies members adopt in response to the sequential nature of proposal making and voting the model permits the characterization of a legislative equilibrium reflecting the structure of the legislature and also allows consideration of the choice of elements of that structure in a context in which the standard institution free model of social choice theory yields no equilibrium

information technology and growth the rapid diffusion of information technology it is a direct consequence of the swift decline in the price of computer related equipment which has led to a vast and continuing substitution of it equipment for other forms of capital and labor this substitution generates substantial returns for the economic agents who undertake it investments and restructure their activities in order to increase the role of it there is little evidence however that substitution is accompanied by technical change as this term is used by economists while this appears highly paradoxical to technologists who think of substitution of a more it intensive mode of production for a less itintensive mode as a change in technology it is entirely consistent with the economic framework developed by robert m solow 1957 what do economists mean by technical change and how could this exclude the substitution of a more it intensive production process for one that is less it intensive substitution represents movement along a given production function while technical change corresponds to a shift in the production function substitution takes place if the introduction of computer intensive equipment produces benefits that are fully captured or internalized by the users of it and their suppliers technical change occurs only if more

which road leads to stable money demand this paper denies that the demand for money function is any more unstable than other demand functions and maintains that the controversies regarding unstable money demand are produce by poor methodology that is not shared by other areas of the field of economics when investigating demand function properties this abstract was borrowed from another version of this item

maintaining and testing separability in demand systems we derive a general elasticity representation of the necessary and sufficient conditions for direct weak separability of the utility function parametric restrictions required to implement the separability conditions are presented for three common demand systems the almost ideal translog and rotterdam our empirical application uses the rotterdam model to test a few separable structures within a complete u s demand system emphasizing food commodities results based on size corrected likelihood ratio tests provide support for commonly used separability assumptions about food and meat demand

peace war and the balance of power every possible relation between the distribution of power and the likelihood of war has been defended somewhere in the literature on international politics war is least likely if power is distributed equally war is least likely if power is distributed unequally and the distribution of power has no effect on the likelihood of war i try to settle this dispute by examining the effect of expectations about the outcome of war on the choice between war and negotiation i argue that each of these mutually contradictory propositions can be derived from some plausible set of premises and thus that which one is correct depends on which set of premises best describes a situation the most important factors affecting the relation between the distribution of power and the likelihood of war are 1 whether the terms of a compromise agreement that might be accepted in lieu of war affect the distribution of power between the antagonists and therefore the probability that the agreement will be enforced and 2 how many states interests will be affected by the outcome

semi non parametric estimates of substitution for canadian monetary assets we estimate the dynamic fourier expenditure system to obtain consistent estimates of short run and long run morishima elasticities of substitution for canadian liquid assets we argue that the variability of the estimated elasticities and evidence of less than perfect substitution between monetary assets interferes with the successful use of simple sum aggre gates and traditional log linear money demand functions

guns butter and anarchy a state in the international system implicit in realism must allocate its limited resources between satisfying its intrinsically valued ends and the means of military power i formalize this guns versus butter problem in a simple infinite horizon model in which two states must continually decide how to allocate their resources and whether to attack the other state the analysis establishes sufficient conditions to ensure the existence of an equilibrium in which neither state attacks shows that there is a strictly pareto dominant pair of peaceful equilibrium payoffs characterizes the unique peaceful markov perfect equilibrium that yields them and describes the comparative statics of the equilibrium allocations more broadly the analysis also suggests that the notion of anarchy has little if any substantive significance distinctively related to international politics and that the problem of absolute and relative gains is superfluous

non cooperative bargaining theory an introduction the paper provides an informal introduction to some of the main themes of the recent literature on non cooperative or sequential bargaining models it focuses in particular on the relationship between the new approach and the traditional axiomatic approach exemplified by nash bargaining theory it illustrates the new insights offered by the non cooperative approach by reference to a detailed analysis of the manner in which the presence of an outside option available to one of the parties will affect the negotiated outcome finally the difficulties which arise in extending this analysis to two person bargaining with incomplete information and to n person bargaining are discussed this is a revised version of the fourth review of economic studies lecture presented in april 1985 at the joint meeting of the association of university teachers of economics and the royal economic society held in oxford the choice of lecturer is made by a panel whose members are currently professors hahn mirrlees and nobay and the paper is refereed in the usual way this paper aims to provide an informal and elementary introduction to an approach to bargaining which has received a great deal of attention over the past few years the approach involves writing down some particular sequence of moves offers and replies to be made over time in the course of negotiations and then looking for a non cooperative equilibrium in the game thus specified in practice a perfect equilibrium or in games of incomplete information a sequential equilibrium while the approach appears at first sight to be very different in spirit from the traditional axiomatic approach in which a bargaining solution is specified by appealing to a number of general requirements which are deemed appropriate on the basis of some a priori considerations the two approaches are in fact complementary while the

the dynamo and the computer an historical perspective on the modern productivity paradox the dynamo and the computer an historical perspective on the modern productivity paradox author s paul a david source the american economic review vol 80 no 2 papers and proceedings of the hundred and second annual meeting of the american economic association may 1990 pp 355 361 published by american economic association stable url http www jstor org stable 2006600 accessed 08 12 2010 01 40

monetary policy and monetary asset substitution abstract this paper shows that changing the target federal funds rate induces changes in relative user costs of monetary assets estimated morishima elasticities of substitution from the fourier flexible form reveal greater substitution from transactions assets and savings deposits into small time deposits than into retail money market mutual funds

the demand for divisia money in the united states a dynamic flexible demand system this paper applies the anderson and blundell 1982 approach to the analysis of the demand for money and attempts to establish the nature of the relationship between divisia money defined from narrow to broad and the nested like assets at different levels of aggregation this is achieved by conducting the analysis within a microtheoretical framework utilizing the demand system approach and by estimating a sequence of nested dynamic specifications and performing tests of the nested structures as well as on economic theory to establish the most restrictive dynamic specification acceptable to the data copyright 1991 by ohio state university press

divisia monetary aggregates the great ratios and classical money demand functions king et al 1991 evaluate the empirical relevance of a class of real business cycle models with permanent productivity shocks by analyzing the stochastic trend properties of postwar u s macroeconomic data they find a common stochastic trend in a three variable system that includes output consumption and investment but the explanatory power of the common trend drops significantly when they add money balances and the nominal interest rate in this paper we revisit the cointegration tests in the spirit of king et al using improved monetary aggregates whose construction has been stimulated by the barnett critique we show that previous rejections of the balanced growth hypothesis and classical money demand functions can be attributed to mismeasurement of the monetary aggregates

investment and technical progress models in which the growth rate is exogenous provide no role for government in determining growth in our model growth is associated with investment through externalities from learning by watching rather than with the level of the capital stock presumption of a technical progress function with first increasing and then decreasing returns leads to multiple steady state growth equilibria there is also an explicit role of government policy in setting tax rates on output it follows that two economies with identical structures and stochastic tax policies may exhibit very different growth paths over sustained periods although the stationary distribution of growth rates is the same given the desirability in principle of subsidizing investment various practical methods are considered copyright 1992 by oxford university press

computers obsolescence and productivity this paper develops a new technique for measuring the effect of computer usage on u s productivity growth standard national income and product accounts nipa measures of the computer capital stock which are constructed by weighting past investments according to a schedule for economic depreciation the rate at which capital loses value as it ages are shown to be inappropriate for growth accounting because they do not capture the effect of a unit of computer capital on productivity this is due to technological obsolescence machines that are still productive are retired because they are no longer near the technological frontier and anticipation of retirement affects economic depreciation using a model that incorporates obsolescence alternative stocks are developed that imply a larger computer usage effect this effect together with the direct effect of increased productivity in the computer producing sector accounted for the improvement in u s productivity growth over 1996 1998 relative to the

computers productivity and input substitution i introduction the last two decades has been a puzzling time for many productivity analysts while computer prices fell at extraordinary rates and firms invested hundreds of billions of dollars in new computer equipment aggregate productivity growth remained sluggish this computer productivity paradox has generated a large literature that examines the economic impact of the computer revolution 1 this paper offers a simple solution to the computer productivity paradox by making careful distinction between computers as an output from one sector and an input to other sectors data for 35 manufacturing and service sectors for 1947 1991 show that sectoral differences are crucial in understanding the impact of computers aggregate analysis is inappropriate since it obscures basic distinctions between a shifting production function in the computer producing sector multi factor productivity growth and movements along production functions in the computer using sectors substitution and capital accumulation once these differences are isolated the growth impact of computers is readily observable the computer producing sector experienced fundamental technological progress and now produces cheaper better computers the sectoral data show this as rapid multi factor productivity mfp growth for 1973 1991 although aggregate mfp growth remains below historic averages the computer producing sector has clearly done its part mfp growth in this sector is many times the economy average and has contributed over one third of aggregate mfp growth for 19811991 the sectoral detail shows that the slowdown in aggregate productivity would have been much more severe were it not for such large mfp gains in the computer producing sector for the other sectors of the economy computers affect growth in a more traditional although less glamorous way when the price of real computing power fell so dramatically in the 1970s and 1980s firms responded by substituting away from relatively expensive labor and non computer capital and investing heavily in cheap computers for these sectors the computer revolution affects output growth not by raising mfp but by inducing firms to accumulate computers at extraordinary rates real computer services for example grew in excess of 20 per year in 14 out of 35 sectors for 1973 1991 although virtually all sectors are rapidly accumulating computer equipment computers remain small in levels in 1991 for example computer investment was only 10 of private fixed investment so the growth contribution of computers remains small relative to sectoral aggregates of labor and non computer capital the rapid rates of accumulation however are clearly making computers a more important source of growth across sectors with this heavy investment also came the wide spread expectation that computers would fundamentally alter the way firms operate and lead to higher mfp the reality has been very different as the most computer intensive sectors show steep declines in mfp growth after 1973 with three quarters of all computers concentrated in three service sectors trade fire and other services however this finding must be interpreted with caution as griliches 1994 notes output in these sectors is largely unmeasurable and thus mfp growth will be understated nonetheless it is quite reasonable that even computer using sectors where output is easier to measure show no mfp gains computer investment creates a capital input that enters the production function like any other purchased input since constant quality deflators embody productivity improvements in investment the direct impact is seen through the rapid capital accumulation only if the adoption of computers leads to production externalities or spillovers would computer investment also increase mfp growth the data however show no evidence of this ii computers and growth the national statistics most clearly show the computer revolution in the investment data

on the formation of alliances in conflict and contests this paper examines the problem of the formation of alliances in conflict and more generally in contests with three players each player possesses an exogenous strategic endowment e g arms efforts rent seeking activity the outcome of contests including those between any alliances of players is governed by a contest success function csf in the three person one cake problem an alliance between two players against the third one will form if and only if the csf has an increasing returns characteristic when an alliance forms there is a tendency to be formed by the weaker players against the strongest player similar tendencies exist in other three person problems that i examine

stability in anarchic international systems can stability emerge solely from the competition and self interest of sovereign powers existing in a state of anarchy or does stability depend on restraints from the complex nexus of interdependencies characterizing the contemporary world economy and its associated institutions we suppose some infinitely divisible resource that all nation states are endowed with and maximize and that enables them to overcome adversaries in the event of conflict we offer a noncooperative extensive form model of international conflict without exogenous mechanisms to enforce agreements in order to learn under what conditions balance of power and collective security ensure the sovereignty of all states in anarchic systems we conclude that there exists at least one world albeit an abstract one in which anarchy yields stability

implicit separability characterisation and implications for consumer demands abstract we characterize a general form of separability which we call implicit separability it is more general than all known types of separability and contains them as special cases we provide complete characterisations in terms of the direct preference ordering its dual expenditure function the demand functions and the slutsky

does the new economy measure up to the great inventions of the past abstract during the four years 1995 99 u s productivity growth experienced a strong revival and achieved growth rates exceeding that of the golden age of 1913 72 accordingly many observers have declared the new economy to be an industrial revolution even more important than the second industrial revolution of 1860 1900 which made the golden age of productivity growth possible this paper dissects the recent productivity revival subtracts out a cyclical component and concludes that there is no revival of the productivity growth trend in the 88 percent of the private economy lying outside of the durables manufacturing sector the paper explains this surprising finding by pointing to limitations in computers and the internet in comparison with the great inventions of the past

the demand for assets and optimal monetary aggregation this paper uses a highly disaggregated demand system to estimate the degree of substitutability among monetary assets and to address the issue of optimal monetary aggregation in the united states we address the problems of dimensionality and nonlinearity estimating a very detailed monetary asset demand system encompassing the full range of assets based on the locally flexible normalized quadratic expenditure function we treat the concavity property as a maintained hypothesis and provide evidence consistent with neoclassical microeconomic theory statistical tests reject the appropriateness of the aggregation assumptions for all the money measures published by the federal reserve as well as for a large number of groupings suggested by earlier studies this supports and reinforces barnett s 2016 assertion that we should employ the broadest m4 monetary aggregate published by the center for financial stability

on the stability of money demand abstract we show that regulatory changes that occurred in the banking sector in the early 1980s that considerably weakened regulation q can explain the apparent instability of money demand starting in the same period we evaluate the effects of the regulatory changes using a model that goes beyond aggregates as m1 and treats currency and different deposit types as alternative means of payments we use the model to construct a new monetary aggregate that performs remarkably well for all the period 1915 2012

divisia aggregation and substitutability among monetary assets in this paper the authors estimate the degree of substitutability among the services of money checkable deposits savings deposits and time deposits in a quasi homothetic translog utility framework for canada the four composites mentioned are formed by aggregating more basic assets such as checkable deposits at banks checkable deposits at trust companies etc traditionally the simple sum aggregation has been used in this context the authors investigate both this alternative and divisia aggregation of the assets they find a low degree of substitution among the services of monetary assets and provide some evidence favoring divisia aggregation over simple sum aggregation copyright 1986 by ohio state university press

research bets and behavioral ir behavioral ir faces a fundamental challenge the actors in most ir models and theories are not individuals they are aggregates like states ministries interest groups political parties and rebel factions there are two broad approaches to attempting to integrate behavioral research about individuals the first a quasi behavioral approach makes nonstandard assumptions about the preferences beliefs or decision making processes of aggregate actors the second tries to build theories in which the key actors are individuals pursuing the former means that the assumptions about actors will be only weakly linked to the empirical findings propelling behavioral research the second approach faces formidable obstacles that international relations theory has confronted for a long time and for the most part has not overcome

monetary aggregation and the demand for assets in this paper we consider and illustrate a solution to the inter related problems of monetary aggregation and estimation of money demand the problem with the definition of money is that the relative prices of the monetary components fluctuate over time rendering simple sum aggregates inefficient the authors apply revealed preference tests to the u s monthly data to determine admissible and separable components these components are then aggregated using the divisia technique to deal with the problem of money demand the dynamic fourier expenditure system is used to provide estimates of the elasticities of substitution these while showing general substitution among the liquid assets studied are quite variable over time this finding underscores the inefficiency of both simple sum aggregation and single equation log linear money demand estimation copyright 1997 by ohio state university press

on the markov switching welfare cost of inflation abstract this paper uses the markov switching approach to account for instabilities in the long run money demand function and compute the welfare cost of inflation in the united states in doing so it circumvents the problem of data mining of some earlier seminal contributions on these issues allowing for complicated nonlinear dynamics and sudden changes in the parameters of the money demand function moreover it extends the sample period and investigates the robustness of results to alternative money demand specifications monetary aggregation procedures and assumptions regarding dynamics aspects of the money demand specification

the translog utility function and the demand for money in the united states in recent years considerable effort has been directed towards establishing the nature of the relationship between money and nearmonies but with mixed success the approaches vary from multi interest rate single equation studies to the careful simultaneous equations studies summarized and amended by feige and pearce 1977 and extended recently by donovan 1978 offenbacher 1979 and barnett 1980 the empirical results also vary with numerous studies favoring only one interest rate see the surveys in fisher 1978 1983 some claiming that a variety of entities are close substitutes for money e g chetty 1969 and others showing that weak substitution or even complementarity may be the result of the measurement of elasticities of substitution between money and a number of other assets e g feige and pearce 1977 offenbacher 1979 and barnett 1980 the debate seems to have overshadowed a second and equally intriguing issue which centers on the establishment of an acceptable definition of money the basic idea of this study is to take an approach that takes account of the different degrees of moneyness possessed by the various monetary assets this paper produces quantitative estimates of the degree of substitutability of other monetary assets for money in the context of a flexible functional form model with a

functional monetary aggregates monetary policy and business cycles abstract in this paper we take the economic approach to monetary aggregation in the context of highly disaggregated demand systems encompassing the full range of monetary assets in the united states we estimate the effectively globally regular minflex laurent ml and normalized quadratic nq flexible functional forms we produce the ml and nq functional monetary aggregates consistent with neoclassical microeconomic theory also addressing the issue of optimal monetary aggregation we highlight the influence of measurement on statistical inference by investigating whether the ml and nq functional monetary aggregates are of importance in resolving paradoxes associated with the measurement of money in doing so we also provide a comparison between the functional monetary aggregates and the fed s broad sum m2 aggregate and the center for financial stability broad divisia m3 and divisia m4 aggregates our detailed statistical analysis favors the functional monetary aggregates

depreciation in production analysis and in income and wealth accounts resolution of an old debate strange as it seems this question of definition has itself been one of the most controversial issues in the whole theory of capital and depending on definitions we get into endless discussions as to how to measure the amount of capital trygve haavelmo 1960 43 emphasis in original most economic controversies about definition arise from a failure to keep in mind the relation of every definition to the purpose for which it is to be used sir john hicks 1942 175 i introduction controversies in the theory of capital have had their counterparts in the measurement of capital which hulten 1990 and others have called one of the most difficult tasks in economics depreciation has been one of the most controversial topics in the measurement of capital a major debate on depreciation concepts and measurement took place in 1972 a debate that has not fully been resolved in the literature on one side edward denison 1972 whose development of growth accounting was accompanied by innovations in measuring all the inputs that contribute to economic growth associated depreciation with the economic accounts concept of capital used up in production in economic accounts depreciation or capital consumption is the quantity subtracted from gross domestic product to obtain net domestic product he also interpreted capital used up as capital s contribution to production that is as a measure of capital input denison s position on capital is essentially identical with the view of capital in the economic accounts literature where depreciation has been interpreted both as an adjustment to income or wealth to account for the loss of value of a capital good and as a measure of the capital good s productive services arrayed on the other side were dale jorgenson and zvi griliches 1972 who were interested in capital measures as ingredients for the study of productivity and the analysis of production in their view depreciation was not a measure of capital input at all but rather a component of the cost of capital services following jorgenson 1974 they computed the contribution of capital to production capital input in a way that made no explicit use of the economic accounts concept of capital used up in production in subsequent exchanges over the past two decades each side has more or less taken the position that its view is right and the other wrong see for example the exchange between young and musgrave 1980 and their discussants rymes 19c 0 and faucett 1980 in consequence a cleavage has persisted between the measures of economic depreciation employed in economic accounts and those that are desired by production analysts and productivity researchers in this article i propose a resolution for the controversy over depreciation as with most controversies the depreciation controversy has many strands which cannot always be unravelled neatly and it has been muddied by confusions the essence of the controversy arose from two different views of what it means to maintain capital intact in economic accounts capital is maintained intact when its potential lifetime productiveness preserves hicksian income capital used up in production is the loss of potential capital productiveness that must be replaced in order to maintain capital intact in the income or wealth sense in production analysis capital is maintained intact when the stock of capital yields the same input capital services to the current period s production as before deterioration is the loss in capital productiveness that must be replaced in order to maintain capital intact in the productive sense these are not equivalent definitions of maintaining capital intact a point developed in the paper both definitions are consistent with capital theory both are valid but for different analytical purposes as the preceding paragraph suggests the depreciation controversy also involved failure to distinguish adequately among the concepts of capital that are appropriate for different purposes exactly the failure noted by hicks in 1942

growth accounting when technical change is embodied in capital this paper revisits the hypothesis that technical change is embodied in capital it extends old results to make them more relevant to the contemporary debates about the adjustment of investment goods for quality change and about the role of embodied technical change as a source of economic growth it is shown that the failure to adjust capital for quality change has the effect of suppressing the quality effects into the conventional total factor productivity residual and it is found that approximately 20 percent of the residual growth of quality adjusted output could be attributed to embodied technical change copyright 1992 by american economic association