multiproduct short run hospital cost functions empirical evidence and policy implications from cross section data economists and policymakers have been interested in hospital costs and the structure of hospital technologies for several decades now early interest was focused on the possibility of scale economies which implied increased efficiency for larger hospitals 6 8 12 13 18 20 while more recent interest has been stimulated by the inflationary spiral of hospital costs 1 15 17 22 as hospital costs have risen important policy questions concerning the impact on costs of the hospitals diagnostic case mix the hospitals admitting physicians the hospitals size and the hospitals efficiency have emerged and researchers have attempted to deal with these issues within the context of increasingly complex econometric models 1 2 5 24 27 however in attempting to analyze these important policy issues researchers have been forced to make two major types of compromises on the one hand appropriate data are often not available for estimating a well specified cost function e g information on admitting physicians and diagnostic case mix are often missing so that problems of specification error often plague the econometric results conversely in using imaginative ways to deal with data problems e g weighting in patient and out patient care to form a single index of hospital services 1 27 or estimating separate cost functions for each department in the hospital 2 researchers sometimes place unrealistic and unnecessary constraints on their econometric models the purpose of this study is to analyze the impact of several of the primary hospital characteristics mentioned above on the short run costs of hospitals within a theoretically consistent framework in the following discussion we also develop the theoretical

capital taxation and accumulation in a life cycle growth model almost all of the serious economic work on savings decisions within the past decade has relied on some variant of the life cycle hypothesis in which savings arise out of individual choices of an optimum lifetime consumption path this paper reexamines the incidence and welfare consequences of capital income taxes within a realistic life cycle model the results suggest that the elimination of capital income taxation would have very substantial economic effects for example a complete shift to consumption taxation might raise steady state output by as much as 18 percent and consumption by 16 percent the long run welfare gain from such a shift would for plausible parameter values exceed 150 billion annually stated somewhat differently shifting to consumption taxation would raise the lifetime utility of the representative consumer by the equivalent of about six years income in the new steady state these estimates dwarf estimates of the static welfare cost of taxation and significantly exceed even extreme previous estimates of the dynamic loss this study departs from earlier analyses of the effects of taxes on capital income in several respects probably the most important difference between this treatment and most preceding ones lies in the assumptions about the interest elasticity of saving it is shown below that the common two period formulation of saving decisions yields quite misleading results a more realistic model of life cycle savings demonstrates that for a wide variety of plausible parameter values savings are very interest elastic this implies that shifting away from capital income taxation would significantly increase capital formation making possible long run increases in consumption many studies of the welfare effects of capital income taxation have ignored the general equilibrium effects of increased capital formation in an economy with life cycle savings there is no presumption that the undistorted growth path corresponds to any sort of social optimum as peter diamond has shown life cycle savings can lead to a steady state capital intensity either greater or less than the golden rule level more generally it is clear that there is no reason to believe that a life cycle economy will maximize any particular intertemporal social welfare function a fundamental tenet of welfare evaluation is that preexisting distortions must be considered in evaluating the consequences of tax changes the results presented in this paper take explicit account of the nonoptimal character of the no tax steady state this explains in large part why such a sizeable welfare effect of capital taxes is found in an economy far from the golden rule level of capital intensity there are substantial gains in steady state consumption achievable through increased capital formation section i of the paper examines the aggregate savings function in a continuous time life cycle framework the second section clarifies the differences between wage and consumption taxes an aggregate production function is added to complete the model in the third section the effects of changes in capital taxes on both steady state incidence and welfare are considered within a general equilibrium framework the final section of the paper discusses some implications of the results and suggests areas which appear to warrant further study assistant professor of economics massachusetts institute of technology and research analyst national bureau of economic research i am grateful to alan auerbach martin feldstein laurence kotlikoff to the participants in the nber workshop on business taxation and to the harvard public finance seminar for useful discussions james poterba and james buchal performed the numerical calculations

economies of scale and input substitution in public libraries abstract a translog cost function is applied to 1988 data for 194 indiana public libraries to measure economies of scale and input substitution elasticities book circulation measures library output and costs include noncapital expenditures scale economies exist for libraries with circulations up to 55 000 per year larger libraries exhibit constant returns to scale labor books and supplies services are all substitutes with inelastic own price and cross price elasticities

the later you pay the higher the k this paper shows the importance of the age path life cycle timing of any tax for the accumulation of capital in the economy income consumption and wage taxes differ in their age paths as well as their incentive effects this paper studies how the differing age path of each tax affects the capital accumulation of the economy in an empirically calibrated life cycle model we investigate lump sum age taxes and find in every case that the later the person pays tax the higher the k of the economy to analyze the life cycle timing effect of conventional transactions based taxes income consumption and wage we replace each tax with a lump sum age tax that has the identical age path of tax payments over the life cycle we find that the timing effect is quantitatively important and often causes the impact of a tax on capital accumulation to be very different from what would be predicted from the incentive effect

demand for factors of production in municipal police departments as the fiscal crises of municipalities deepen the search for ways to reduce the cost of providing municipal services increases in the production of police service the use of civilians to handle administrative jobs has mcrease in this regard the studies of demand for productive factors in municipal police departments becomes interesting several attempts have been made to estimate input demands or expenditure functions for police departments carr hill and stern 5 chapman et al 161 vatey and philips 231 pbifips and votey 201 greenwood and wadyeki 1121 ohls and wales 18 and ehrlich ll all have estimated the demand for factors as part of a simultaneous equation system most of these studies were not interested in the factor demands they were only necessary to estimate correctly the supply of offense equations same of the equations are no1 carefully specified and justified there are however some single equation studies hirsch 15 borcherding and deacon 4 bergstrom and goodman l and mcdougall i 61 all estimated police demand equations all the above studies use lhe cobb douglas or the ces functional form functional forms that are too restrictive in particular the assumptions of constant elasticity of substitution between inputs is unacceptable when there are more than two inputs second these studies have created police production as nonjoint even though police departments are considered as multiproduct firms producing a variety of outputs philips 19 has employed the constant difference elasticity production function to estimate factor demands in municipal police departments in

channels of interstate risk sharing united states 1963 1990 we develop a framework for quantifying the amount of risk sharing among states in the united states and construct data that allow us to decompose the cross sectional variance in gross state product into several components which we refer to as levels of smoothing we find that 39 percent of shocks to gross state product are smoothed by capital markets 13 percent are smoothed by the federal government and 23 percent are smoothed by credit markets the remaining 25 percent are not smoothed we also decompose the federal government smoothing into subcategories taxes transfers and grants to states

consumption insurance between japanese households this paper examines the implication of the full insurance hypothesis and differences in its applicability across groups of households in japan using a rare japanese individual panel data set called the japanese panel survey of consumption the paper first shows that the full insurance hypothesis is strongly rejected for the country as a whole the paper further shows that the rich as well as the poor and also college graduates as well as non college graduates cannot insure their consumption against income shocks in sharp contrast urban residents can pool income shocks completely whereas rural residents cannot rural residents suffer from income risks more seriously than urban residents in japan

sectoral patterns of technical change towards a taxonomy and a theory abstract the purpose of the paper is to describe and explain sectoral patterns of technical change as revealed by data on about 2000 significant innovations in britain since 1945 most technological knowledge turns out not to be information that is generally applicable and easily reproducible but specific to firms and applications cumulative in development and varied amongst sectors in source and direction innovating firms principally in electronics and chemicals are relatively big and they develop innovations over a wide range of specific product groups within their principal sector but relatively few outside firms principally in mechanical and instrument engineering are relatively small and specialised and they exist in symbiosis with large firms in scale intensive sectors like metal manufacture and vehicles who make a significant contribution to their own process technology in textile firms on the other hand most process innovations come from suppliers these characteristics and variations can be classified in a three part taxonomy based on firms 1 supplier dominated 2 production intensive 3 science based they can be explained by sources of technology requirements of users and possibilities for appropriation this explanation has implications for our understanding of the sources and directions of technical change firms diversification behaviour the dynamic relationship between technology and industrial structure and the formation of technological skills and advantages at the level of the firm the region and the country

the after tax rate of return affects private savings level of savings and the rate of capital formation are of central concern to both economists and policymakers although the welfare effects of tax reforms do not directly depend on their impact on savings the effects of taxes on savings is crucial to considerations of tax incidence and equity and to the issue of long run growth the impact of the rate of return on consumption and savings decisions also bears on questions regarding the appropriate government discount rate the short run crowding out effects of fiscal policy and the effects of public indebtedness on capital intensity the traditional view among economists is that changes in the rate of return are likely to have only a small effect on the savings rate this consensus is supported by theoretical arguments pointing to the opposing income and substitution effects associated with changes in the rate of return the ambiguous implications of theory are matched by empirical studies which yield conflicting estimates as to the size of the impact of changes in the rate of return the polar empirical estimate is michael boskin s 1978 suggestion that the interest elasticity of savings is 4 this estimate is widely regarded as too high

equilibrium consumption and precautionary savings in a stochastically growing economy abstract the derivation of a closed form solution for consumption based on the constant elasticity utility function in the presence of stochastic labor income has proved to be intractable this paper derives a closed form equilibrium relationship between consumption and wealth one that holds along a balanced growth path in a stochastic romer endogenous growth model by employing more general recursive preferences we can disentangle the coefficient of relative risk aversion from the intertemporal elasticity of substitution the effects of key structural parameters on equilibrium consumption and its tradeoff with leisure are analyzed a significant aspect of our analysis concerns the extent to which current risk in the economy is shared between labor and capital this plays an important role in determining the impact of risk on the economy in general and on consumption in particular formal analysis is supplemented with extensive numerical simulations

who is credit constrained in the u s economy an important assumption of the life cycle model of consumption is the postulate of perfect capital markets this hypothesis has recently been challenged by substantial empirical evidence hall and mishkin 1982 using the panel study of income dynamics estimate that 20 percent of united states families are liquidity constrained mariger 1986 derives a life cycle model with endogenous liquidity constraints and using a cross section estimates this fraction to be 19 4 percent hubbard and judd 1986 simulate a model with a constraint on net worth which shows that with reasonable assumptions about preferences 19 0 percent of united states consumers are liquidity constrained the emerging consensus points therefore to a fraction of approximately 20 percent of the population behaving in a manner that is inconsistent with the pure life cycle model in addition hayashi 1985 and zeldes 1989 investigate the correlation among consumption wealth and income for various population groups and infer that liquidity constraints are more important for younger families with low levels of wealth and saving the main limitation of these studies is that in their data sets constrained consumers are not observable and have to be identified via indirect evidence thus there is as yet little firm evidence about the characteristics of the consumers who are likely to be credit constrained this paper adopts an approach that differs from previous tests for liquidity constraints because it makes use of data where constrained consumers are observable and explicitly links their existence to credit market imperfections and personal characteristics the data drawn from the 1983 survey of consumer finances scf and described in section ii provide information on individuals whose request for credit has been rejected by financial intermediaries in section iii a model is developed in which consumers and lenders behavior jointly determines the probability that a consumer is rationed in the credit market this probability is then

intranational business cycles in the united states abstract we established a comprehensive set of stylized facts for intranational business cycles across states and regions in the u s notable findings are that the cross correlations of our consumption measure is much less than that for output and the volatility of the real exchange rate between states is much less than that for output these findings are contrasted with the quantity and price anomalies found in international business cycle data additional results for labour and non labour earnings suggest that the observed amount of intratemporal risk sharing is quite limited as compared to that for intertemporal risk sharing

the dynamics of technological change in uk retail banking services an evolutionary perspective abstract the purpose of this paper is to elaborate an evolutionary perspective on the process of structural change that has characterized the banking industry in the united kingdom uk for this purpose the evolution of retail financial services is contrasted against the backdrop of the implementation and development of information and communication technologies icts the paper delves into the sources and the effects of technological change in banking over a long term perspective 1840s 1990s to point out the significance of the opportunities and the constraints that have shaped the growth and development of this industry this is interpreted as a three stage evolutionary process driven by intertemporal coordination across several complementary domains including activities of production business organization consumption and the underlying regulatory setting it is concluded that the evolution of uk retail banking displays the characteristics of a distributed process of innovation in which developers of technologies service suppliers and customers contribute to the process of structural change of the industry

international risk sharing and european monetary unification abstract we explore income and consumption smoothing patterns among european community ec countries and among oecd countries during the period 1966 90 we find that for oecd as well as for ec countries about 40 percent of shocks to gdp are smoothed at the one year frequency with about half the smoothing achieved through national government budget deficits and half by corporate saving at the three year differencing frequency only 25 percent of shocks to gdp are smoothed mainly via government lending and borrowing in the absence of alternative income and consumption smoothing mechanisms the restrictions on budget deficits imposed by the maastricht treaty should be relaxed to allow governments to run large temporary deficits in response to output shocks

does buffer stock saving explain the smoothness and excess sensitivity of consumption one of the lasting contributions to modernday consumer theory is the idea that consumption is determined by the expected value of lifetime resources or permanent income the modern day specification of this concept is typically presented as a special case of intertemporalchoice theory where felicity functions are quadratic labor income is stochastic there are no restrictions on borrowing consumers have infinite horizons and expectations are formed rationally we refer to this model as the permanentincome hypothesis pih although the pih has considerable intuitive appeal a series of influential papers published after its inception revealed two notable discrepancies between the model s predictions and aggregate data first the model predicts that consumption growth should be more volatile than income growth if aggregate income growth has positive serial correlation as the quarterly data suggest it does yet aggregate consumption growth is in fact much smoother than aggregate income growth angus deaton 1987 john y campbell and deaton 1989 jordi gali 1991 second the pih predicts that consumption changes should be orthogonal to predictable or lagged income changes yet the coffelation between consumption growth and lagged income growth has been found to be one of the most robust features of aggregate data for example marjorie a flavin 1981 alan s blinder and deaton 1985 campbell and n gregory mankiw 1989 orazio p attanasio and guglielmo weber 1993 thus aggregate consumption growth has been described as exhibiting two puzzles it is both excessively smooth relative to current labor income growth and excessively sensitive to lagged labor income growth 2 in response to these and other empirical anomalies researchers have recently sought out modifications of the pih framework chief ludvigson federal reserve bank of new york 33 liberty street new york ny 10045 michaelides university of cyprus p o box 20537 1678 nicosia cyprus a previous version of this paper appeared under the title can we explain the consumption excesses yet aggregate consumption implications of buffer stock saving behavior for many helpful comments we thank orazio attanasio dave backus ben bernanke john y campbell christopher carroll todd clark angus deaton pierreolivier gourinchas bo honore james kahn martin lettau costas meghir christina paxson steve pischke andrew samwick christopher sims mark watson guglielmo weber michael woodford steve zeldes and two anonymous referees conference participants at the national bureau of economic research summer workshop on the aggregate implications of microeconomic consumption behavior july 1998 the tmr workshop on saving and pensions center tilburg university march 1999 and the new york area macroeconomics workshop october 1998 seminar participants at columbia university insead the new york federal reserve university college london london business school city university business school university of cyprus tel aviv university and jeffrey brown for excellent research assistance the views expressed are those of the authors and do not necessarily reflect those of the federal reserve bank of new york or the federal reserve system any errors or omissions are the responsibility of the authors 1 note that the important insight of danny quah 1990 that individuals may be better able than econometricians to distinguish short run from long run innovations to their income cannot resolve the excess smoothness puzzle laid out in campbell and deaton 1989 these authors show that in the context of the pih excess sensitivity and excess smoothness are the same phenomena in addition campbell 1987 demonstrates that superior information of the type emphasized by quah will show up in households saving behavior and using this information allows the econometrician to control for the agent s private information when predicting income since excess sensitivity is well established and controlling for saving does not eliminate it see campbell and deaton 1989 the observed smoothness of consumption cannot be explained by superior information on the part of permanent income consumers see deaton 1992 for further discussion 2 philippe bacchetta and stefan gerlach 1997 and ludvigson 1999 document another kind of excess sensitivity the correlation between consumption growth and predictable changes in consumer credit although we do not explore these findings here ludvigson finds that a bufferstock model with time varying liquidity constraints can replicate such a correlation

intranational risk sharing and its determinants abstract we develop a model of risk sharing in which agents can pool their consumption risks in both national and local markets and then smooth the remaining consumption fluctuations with credit markets estimating the model with a unique dataset on chinese cities we find that the participation rate in risk sharing is low but upon entering the market agents tend to pool risk in the national market rather than the local market the welfare gain from reaching the perfect consumption risk sharing at the national market could be as large as 4 of the perpetual deterministic consumption flow however conditional on the estimated degree of risk sharing participation the welfare gain from pooling all income risks at the national market is only 0 1 empirical analysis on the determinants of city risk sharing reveals that the degree of risk sharing depends on initial economic development and share of gdp contributed by tertiary industry

technological networking and innovation implementation this paper presents a theory of innovation which presumes that new technologies emerge from a firm s accumulated stock of skills among these we distinguish technological and networking skills we examine two aspects of innovating firms their inclination to adopt a technological innovation and their propensity to implement innovation alone or with other firms historical conditions pertaining to organizational skills are examined to account for these aspects among the most important are a firm s cumulative stream of technological projects that have some affinity to the new technology a second important antecedent can be inferred from a firm s history of technological networking networking includes licensing joint ventures and long term contracts and can be formed for technological reasons or for reasons having to do with the delivery of products and services networking is deemed important for facilitating access to strands of technology that are alien to a firm linkages are also conducive for con

myopia liquidity constraints and aggregate consumption a simple test this note conducts a simple test for myopia and liquidity constraints in aggregate u s consumption the test exploits the fact that under myopia consumption should be equally sensitive to predictable income declines and increases while under liquidity constraints consumption should be more sensitive to predictable income increases than to declines using quarterly postwar data the author shows that aggregate consumption is in fact more sensitive to predictable income declines than increases this perverse asymmetry is inconsistent with both myopia and liquidity constraints but is qualitatively consistent with recent theoretical work incorporating loss aversion into intertemporal preferences

a multi country real business cycle model with heterogeneous agents a multicountry real business cycle model is developed capturing two important aspects of heterogeneity found in household survey data only a small fraction of the population holds stock and a significant fraction of nonstockholders are borrowing constrained the model is applied to data for twenty oecd countries it generates cross country consumption correlations consistent with those observed in the data potential welfare gains from international portfolio diversification by stockholders are large leaving the observed home bias as a significant puzzle the model can also account for the finding in u s data that consumption of stockholders is more volatile than that of nonstockholders copyright 1996 by the editors of the scandinavian journal of economics

technological convergence and scope of organizational innovation abstract many industries are faced with increasingly merging and overlapping technologies with multiple technological strands converging it is incumbent upon firms to stay on the top of these developments a firm will succeed to the extent that it can cover a wider range of innovative activities whether alone or in partnership with other firms this paper examines a firm s innovation in information technology such innovations vary widely in their scope with some involving a very limited range of skills rendering them more incremental given a firm s inclination toward specialization the adoption of broad innovations is more feasible if it has developed interfirm arrangements which provide access to distant technology in a study of commercial banks it was found that the scope of new information technologies is contingent upon a firm having developed linkages particularly with firms whose industries provide complementary knowledge

risk sharing within the united states what do financial markets and fiscal federalism accomplish we measure income uncertainty at the level of u s states and the extent to which it has been reduced through risksharing using a method recently developed by athanasoulis and van wincoop 2000 risk is measured as the standard deviation of state specific income growth uncertainty measured by using the error term of a regression of income growth on variables in the information set risk sharing is measured by the extent to which this standard deviation has been reduced through financial markets and federal fiscal policy the advantage of this measure over the existing risk sharing literature is that the interpretation does not depend on many auxiliary assumptions our findings on the extent of risk sharing are insensitive to the only assumption we need to make the variables that are in the information set we find that the standard deviation of state specific income growth uncertainty is reduced by less than half through financial markets and federal fiscal policy we show that the extent of risk sha

the sensitivity of consumption to transitory income estimates from panel data on households we investigate the stochastic relation between income and consumption specifically consumption of food within a panel of about 2 000 households our major findings are 1 consumption responds much more strongly to permanent than to transitory movements of income 2 the response to transitory income is nonetheless clearly positive 3 a simple test independent of our model of consumption rejects a central implication of the pure life cycle permanent income hypothesis the observed covariation of income and consumption is compatible with pure life cycle permanent income behavior on the part of80 percent of families and simple proportionality of consumption and income among the remaining 20 percent as a general matter our findings support the view that families respond differently to different sources of income variations in particular temporary income tax policies have smaller effects on consumption than do other more permanent changes in income of the same magnitude this abstract was borrowed from another version of this item

the flypaper effect and other anomalies abstract i develop a model in which income both in its own right and as a proxy for other socioeconomic characteristics is an input in the production function for local public services the most obvious example is education though there are other applications as well the comparative statics results from this model yield the following results 1 the observed flypaper effect the tendency for local government to spend a higher fraction of unrestricted grants than income of residents may be due at least in part to the fact that own income but not grants is a substitute for purchased inputs in the technology hence the propensity to spend on purchased inputs out of own income is lower than out of grants 2 the income elasticity of demand for public sector output may be higher than the observed income elasticity of demand for purchased inputs 3 equalization of educational opportunity via wealth neutrality as suggested by feldstein requires major changes in education finance once we recognice the distinction between purchased inputs and output

borrowing constraints and international risk sharing evidence from asymmetric error correction we analyse the adjustment process of consumption growth after disequilibrating output shocks in a sample of organization for economic cooperation and development oecd countries in particular we test the hypothesis that consumption is smoothed to a lesser degree after negative shocks whereas the impact of a positive shock is delayed for a longer period of time our analysis is based on an error correction framework that allows for asymmetric adjustment we find that the mean adjustment lag after a negative shock is significantly shorter than after a positive shock especially since the beginning of the 1980s this result is consistent with the interpretation that borrowing constraints limit the degree to which the impact of negative shocks on consumption can be smoothed

the intertemporal elasticity of substitution an analysis based on japanese data this paper investigates whether the intertemporal elasticity of substitution ies for japan possesses similar properties to that found for the united states in the literature as the existing empirical findings are mixed there is no clear consensus this paper uses a model with both production and non separability between nondurables and durables in order to control for possible factors that cause a bias in the ies we present the empirical results demonstrating that the ies is quite similar between the two countries

a simple test of consumption insurance are consumers effectively insured against idiosyncratic shocks to income or wealth either by formal institutions such as charities private insurance and government programs or by informal mechanisms such as gifts and loans from relatives friends and neighbors under full insurance consumption growth should be cross sectionally independent of idiosyncratic variables that are exogenous to consumers this proposition is tested by cross sectional regressions of consumption growth on a variety of exogenous variables full insurance is rejected for long illness and involuntary job loss but not for spells of unemployment loss of work due to strike and an involuntary move

the intertemporal elasticity of substitution an exploration using a us panel of state data this paper uses state level consumption data to estimate the intertemporal elasticity of substitution of consumption ies in contrast to the results of hall 1988 and campbell and mankiw 1989 we provide evidence indicating that the ies is significantly different from zero and probably close to one since inference about the ies in the context of the standard euler equation is problematic as a result of mis specification bias we cast most of our discussion in the context of the framework developed by campbell and mankiw this modifies the euler equation in that a fraction of agents simply consume their income the use of panel data to examine the relationship between interest rates and consumption growth has two advantages first we achieve a significant increase in precision which in particular allows us to rule out a zero ies second we can use the panel aspect of the data to bypass asset return measurement problems in particular we identify a common time component in expected consumption growth that is associated with movements in interest rates when the ies is positive

the regional distribution of public employment theory and evidence abstractthe regional distribution of public employment theory and evidence regional studies this article analyzes the optimal regional pattern of public employment in an information constrained second best redistribution policy it shows that regionally differentiated public employment can serve as an expenditure side tagging device bypassing or relaxing the equity efficiency trade off the optimal pattern exhibits higher levels of public employment in low productivity regions and is more pronounced the higher is the degree of regional inequality empirically using a panel of european regions from 1995 to 2007 the analysis finds evidence that public employment is systematically higher in low productivity regions the latter effect is stronger in countries with higher levels of regional inequality

risk sharing and industrial specialization regional and international evidence the authors provide empirical evidence that risk sharing enhances specialization in production to the best of their knowledge this well established and important theoretical proposition has not been tested before the empirical procedure is summarized as follows first the authors construct a measure of specialization in production and calculate an index of specialization for each of the european community ec and non ec oecd countries u s states canadian provinces japanese prefectures latin american countries and regions of italy spain and the united kingdom then they estimate the degree of capital market integration a measure of risk sharing within each of these groups of regions the ec countries the non ec oecd countries the united states canada japan italy spain and the united kingdom and rely on another author s estimate for latin america finally they perform a regression of the specialization index on the degree of risk sharing controlling for relevant economic variables they find a positive and significant relation between the degree of specialization of individual members of a group of countries provinces states or prefectures and the amount of risk that is shared within the group the authors perform regressions using variables such as shareholder rights and the size of the financial sector relative to gdp as instruments for the amount of inter regional risk sharing these regressions confirm that risk sharing facilitated by a favorable legal environment and a developed financial system is a direct causal determinant of industrial specialization this abstract was borrowed from another version of this item

international real business cycles we ask whether a two country real business cycle model can account simultaneously for domestic and international aspects of business cycles with this question in mind we document a number of discrepancies between theory and data the most striking discrepancy concerns the correlations of consumption and output across countries in the data outputs are generally more highly correlated across countries than consumptions in the model we see the opposite

public employment and regional risk sharing we provide an empirical analysis of regional risk sharing in norway over the period 1977 90 the approach of asdrubali sorensen and yosha 1996 is extended to take public employment into account as a possible shock absorber the other channels of risk sharing are capital markets and commuting taxes and transfers and credit markets the estimated degree of regional consumption insurance is very high we cannot reject the hypothesis that there is full interregional risk sharing in the short term public employment absorbs up to 25 percent of private sector output shocks in our analyses generally central government insurance against regional shocks is relatively more important the more permanent the shocks are and vice versa for market based risk sharing channels