international consumption risk sharing this paper formally examines the implications of international consumption risk sharing for a panel of industrialized countries we theoretically derive the international consumption insurance proposition in a simple setup and show how to modify it in more complicated models we analyze the implications of the theory for pairs of countries and find that aggregate domestic consumption is almost completely insured against idiosyncratic real demographic fiscal and monetary shocks over short cycles but that it covaries with these variables over medium and long cycles the cross equation restrictions imposed by the theory are rejected the policy implications are discussed

economies of scale in multi product firms an empirical analysis this paper presents new evidence on scale economies in multiproduct firms previous studies are limited in view of r ecent advances in the theory of the multiproduct firm the water util ity is chosen here as a multiproduct firm providing multiple services to various classes of customers with spatial variation a translog m ultiproduct cost function is estimated based on duality between tran sformation and cost functions the paper analyzes overall as well as product specific scale economies it also discusses ray average cos t curves and derives the m locus which provides useful information on scope economies and the cost minimizing number of firms copyright 1987 by the review of economic studies limited

new revelations about unemployment persistence in spain time series and panel data approaches using regional data this article aims to re examine the persistence of unemployment in spain for this purpose we use time series and cross section analysis from a time series viewpoint we disaggregate unemployment by regions and use unit root tests ar coefficients and fractional differencing parameters as indicators of persistence for the cross section approach we first estimate mean regressions of regional unemployment rates then using a panel of 114 periods and 50 provinces we estimate pooled fixed and random effects models finally following some recent developments we implement several panel data unit root tests previous studies had already shown the strong persistence of spanish unemployment our disaggregated analysis extends the finding to reveal that the persistence is greater in the most industrialized regions the results also suggest that a structural break took place in 1994 implying a decline in the unemployment persistence since then

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

tastes and technology in a two country model of the business cycle explaining international trade on international financial markets allows people to insure country specific risk and smooth consumption intertemporally equilibrium models of business cycles with trade on global financial markets typically yield international consumption correlations near one and excessive volatility of investment the authors incorporate nontraded goods in the model and find that the implications for aggregate consumption investment and the trade balance are consistent with business cycle properties of industrialized countries however the model driven by technology shocks alone yields counterfactual implications for comovements between consumption and prices at the sectoral level taste shocks produce price quantity relationships more consistent with the data copyright 1995 by american economic association

transitory shock or structural shift the impact of the early 1980s recession on british regional unemployment this paper examines the impact of the early 1980s recession on regional unemployment in britain more specifically it seeks to evaluate the hypothesis that this recessionary shock was so severe that it caused an upward structural shift in the underlying mean unemployment rates of the regions this proposition is analysed using dickey fuller tests for difference versus trend stationarity and the augmented structural shift and trend break time series models developed by perron the results suggest that the apparent stochastic non stationarity in regional unemployment over the period 1965 95 is in fact due to an upward structural shift in regional mean unemployment rates in 1980 furthermore the nature of this shift appears to have differed as between the northern and southern regions of the country

the economic environment and public enterprise behaviour belgian railroads 1950 86 the purpose of this paper is to estimate the impact of variations in the economic environment on allocatively inefficient behaviour by public enterprises and to measure the implications of both allocative and technical inefficiency for the firm s costs and factor use empirical results for the belgian railroad company suggest the importance of unemployment and the pressure experienced by managers to reduce the deficit as explanatory variables of allocative inefficiency the implications of inefficiencies for factor use are found to be substantial although the associated costs are quite small

regulation of public utilities under asymmetric information we consider the relationship between a localcommunity and a private operator in charge ofthe water utility an important feature of themodel is the possibility of water networklosses that are costly to the operator wecompute the first best and asymmetricinformation solutions to the optimal contract with private information on the operator stechnology based on an econometric estimationof production cost and water demand for a panelof french local communities we simulate theoptimal contract solutions and show thatasymmetric information has importantconsequences for the regulation of water publicutilities

production costs inefficiency and source water quality a stochastic cost frontier analysis of canadian water utilities this analysis employs a stochastic cost frontier to estimate relationships between source water quality production costs and cost efficiency in canadian municipal water treatment facilities data for the analysis are obtained primarily from a census of water providers that contains detailed information on operational costs source water quality and treatment technologies results show water quality as measured by turbidity is a significant determinant of production costs the estimated elasticity for turbidity is 0 1 with a 95 confidence interval of 0 06 to 0 14 we find no significant differences in cost efficiency across regions treatment technologies output or turbidity levels

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

dynamics and heterogeneity of inter and intranational risk sharing this study extends the empirical model of incomplete risk sharing developed by crucini 1999 by allowing unequal income pooling and explores the implications of using an alternative measure for aggregate risk based on samples from canadian provinces g 7 and oecd countries spanning the years 1961 2008 we show that the empirical procedure used by crucini tends to overstate the average degree of risk sharing and understate the dispersion of risk sharing when compared to our unequal income pooling model the empirical results from our unequal pooling model show that i the degree and dispersion of risk sharing across canadian provinces g 7 countries and oecd countries remain stable over time ii the degree of risk sharing across canadian provinces is higher than that across the g 7 and oecd countries and iii the degree of risk sharing seems positively related to equity and trade diversification

average cost efficiency and optimal scale sizes in non parametric analysis under fairly general assumptions requiring neither a differentiable frontier nor a constant returns to scale technology this paper introduces a new definition of an optimal scale size based on the minimization of unit costs the corresponding measure average cost efficiency combines scale and allocative efficiency and generalizes the measurement of scale economies in efficiency analysis while providing a performance criterion which is stricter than both cost efficiency and scale efficiency measurement the average cost efficiency is not reliant upon the uniformity of the firms input price vector and we supply procedures to compute it in both convex and non convex production technologies empirical illustration of the theoretical results is given with reference to large sets of production units

non joint technologies the hypothesis of non jointness in input quantities separate production functions is well known and it plays an important role in many areas of economics in this paper we define three additional forms of non jointness which have received little or no attention in the literature and which might be relevant for the firm as well as for the representation of the aggregate technology we characterize all forms of non jointness in terms of variable profit and joint cost functions this yields a number of restrictions which are all testable empirically the assumption that production is non joint in input quantities separate production functions inputs allocated between the different production processes plays a crucial role in many areas of economic theory we need only think of international trade theory public finance macroeconomics growth theory or traded non traded good models of international finance in fact it is safe to say that more often than not production is assumed non joint in input quantities in multiple output models little work has been done to test the empirical validity of the assumption of non jointness in input quantities samuelson 1966 studies the characterization of non joint technologies in terms of the transformation function as pointed out by hall 1973 however samuelson s results do not seem very useful for econometric work hall studies the characterization of non jointness in input quantities in terms of the joint cost function this leads to a number of restrictions which can easily be imposed or tested for and which were used in empirical work by burgess 1976 and by kohli 1981 lau 1972 1978 finally characterizes non jointness in input quantities in terms of the profit function besides non jointness in input quantities lau also examines the case of non jointness in output quantities when an input can be cracked into several outputs in this paper we define two additional cases of non jointness and we characterize them in terms of the joint cost function and the variable or normalized restricted profit function the new forms of non jointness that we define may be useful to describe technologies at the level of the firm and may be even more so at the aggregate level some may be useful concepts in other areas of economics as well such as consumer theory by distinguishing between the various forms of non jointness one obtains a number of testable restrictions on the corresponding joint cost or variable profit functions

unemployment a survey this paper presents a survey of the economics of unemployment it covers competitive and imperfect competition models the role of different methods of wage determination and explanation of postwar unemployment patterns in the oecd countries copyright 1990 by royal economic society

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

topics in the oecd phillips curve how strongly have wages and unemployment been related in oecd countries during the postwar period a simple answer is that on average a one percentage point higher rate of unemployment has been associated with a fall of about one percentage point in the rate of nominal wage increase in the current year compared with the rate of increase a year earlier but such a figure needs interpretation and the aim here is to describe wage behaviour in more detail

fiscal flows in the united states and canada lessons for monetary union in europe regional flows of federal taxes and transfers within the united states and canada are used to analyze long term fiscal flows the redistributive element and short term responses to regional business cycles the stabilization element in the united states long run flows amount to 22 cents in the dollar while the stabilization effect is 31 cents in the dollar in canada the redistributive effect is larger 39 cents and the stabilization effect smaller 17 cents federal flows appears to depend on the institutional structure of the country concerned however in both countries the redistributive element is considerably larger than the amounts involved in the ec structural funds program as for stabilization national fiscal policies in the ec appear to have been as effective as federal governments in the united states and canada in cushioning shocks to incomes

cross border returns differentials were the u s to persistently earn substantially more on its foreign investments u s claims than foreigners earn on their u s investments u s liabilities the likelihood that the current environment of sizeable global imbalances will evolve in a benign manner increases however we find that the returns differential of u s claims over u s liabilities is far smaller than previously reported and importantly is near zero for portfolio equity and debt securities for portfolio securities we confirm our finding using a separate dataset on the actual foreign equity and bond portfolios of u s investors and the u s equity and bond portfolios of foreign investors in the context of equity and bond portfolios we find no evidence that the u s can count on earning more on its claims than it pays on its liabilities finally we reconcile our finding of a near zero returns differential with observed patterns of cumulated current account deficits the net international investment position and the net income balance jel codes f3

the elasticity of scale and the shape of average costs different concepts of returns to scale the first which is most widely used for defining returns to scale is the relative increase in output as all input quantities are increased proportionally along a ray through the origin the second which is the more relevant concept for micro economic analysis is the increase in output relative to costs for variations along the expansion path where input prices are constant and costs are minimized at every output 2 as it turns out these two concepts yield equal measures for the elasticity of scale3 e at every minimum cost point in the input space however the change in e with output is generally different for the two concepts 4 since expansion paths do not coincide with rays unless the production function is homothetic 5 but it is the change of e along the expansion path and not along the raywhich determines the shape of the average cost curve ac and which is therefore relevant for the analysis of firms and industry behavior under competition 6 these relations are stated and analyzed below it is shown that assumptions made in the literature7 which are related to the behavior of e along rays or to the slope of the technically optimal surface where returns to scale are locally constant are irrelevantbeing neither necessary nor sufficient for implying classical u shaped average cost curves the following definitions and results are used here

what can explain the apparent lack of international consumption risk sharing recent research in international business cycles finds that international consumption comovements do not match the risk sharing predictions of standard complete markets models in this paper i ask whether two different types of explanations can help explain this result 1 nonseparabilities between tradables and nontradable leisure or goods and 2 the effects of capital market restrictions on consumption risk sharing i find that risk sharing cannot be resolved by either explanation alone however when i allow for both nonseparabilities and certain market restrictions risk sharing among unrestricted countries cannot be rejected this evidence suggests that a combination of these two effects may be necessary to explain consumption risk sharing across countries

consumption and real exchange rates in dynamic economies with non traded goods abstract we examine the possibility that non traded goods may account for several striking features of international macroeconomic data large persistent deviations from purchasing power parity small correlations of aggregate consumption fluctuations across countries and substantial international real interest rate differentials a dynamic exchange economy is used to show that non traded goods in principle can account for each of these phenomena in the theory there is a close relation between fluctuations in consumption ratios and those in bilateral real exchange rates but we find little evidence for this relation in time series data for eight oecd countries

analysis of hospital production an output index approach in this study a new model of hospital costs is developed and estimated utilizing an output index this theoretically appropriate output index is constructed to accurately reflect the differentiated nature of hospital care by employing both patient and diagnosis characteristics in its construction using this output index we estimate a long run translog cost function with a dataset of 321 california hospitals for the year 2003 we find evidence of economies of scope across specialties within primary care and evidence of scope diseconomies within secondary and tertiary care point estimates of scale economies using the output index indicate that minimum efficient scale is reached at a larger level than when using less refined output measurement techniques that have often been used in similar studies our estimates indicate the importance of accounting for specialty specific scope economies when analyzing the production properties of firms producing differentiated products

evaluating the welfare effects of reforming municipal water prices abstract despite the strong criticisms by economists of water utility pricing practices and the presence of well articulated theoretical models of efficient pricing alternatives few empirical studies have documented the magnitude of the efficiency gains from altering water prices the structures of water supply costs and water demands are estimated using data from vancouver canada a simulation program uses these estimated relationships to compute the impact upon a representative water utility s output and deficit and upon aggregate consumer surplus of a move from its current practice to efficient prices simulation results show that a move to seasonally differentiated pricing with an annual charge calculated to recoup the resulting deficit raises aggregate surplus by approximately 4 this result contrasts with recent water pricing studies that found welfare improvements of approximately 1

full insurance in the presence of aggregate uncertainty this paper tests implications of full consumption insurance the object is to determine how much mileage can be obtained from a model with complete markets with such features as private information or liquidity constraints omitted the implication exploited is that individual consumption responds to aggregate risk but not to idiosyncratic risk the test involves regressing the change in household consumption onto the change in aggregate consumption and other right hand side variables such as the change in household income and change in employment status all variables other than the change in aggregate consumption are predicted to be insignificant in explaining the change in household consumption with observations on consumption and income for 10 695 households from the consumer expenditure survey the results are mixed the results for one specification exponential utility are mostly consistent with full consumption insurance the results for the other specification power utility are not

are valuation effects desirable from a global perspective abstract recent studies have emphasized the role of valuation effects due to exchange rate movements in easing the process of adjustment of the external balance of a country this paper asks to what extent valuation effects are desirable from a global perspective as a mean to achieve an efficient allocation of resources in a frictionless world it is desirable to have large movements in prices and exchange rates but once a small degree of price rigidity is introduced not only should prices be stabilized but also the response of the exchange rate should be muted there is a minor role for valuation effects that depends both on the size and composition of assets and liabilities

public versus private water delivery a hedonic cost approach automotive news 1967 almanac detroit slocum publishing co 1967 bucklin louis p competition and evolution in the distributive trades englewood cliffs new jersey prentice hall 1972 federal trade commission annual line of business report 1974 washington ftc 1981a processed annual line of business report 1975 washington ftc 1981b processed guth louis a robert a schwartz and david k whitcomb the use of buyer concentration ratios in tests of oligopoly models this review 58 nov 1976 488 491 jeifreys james b the distribution of consumer goods new york cambridge university press 1950 lilly digest indianapolis ely lilly and co 1976 martin stephen advertising concentration and profitability the simultaneity problem belljournal 10 autumn 1979 639 647 national petroleum news fact book 1976 new york mcgraw hill 1976 ncr expenses in retail business dayton ohio ncr undated but about 1966 and about 1976 strickland allyn d and leonard w weiss advertising concentration and price cost margins journal of political economy 84 oct 1976 1109 1123 u s department of commerce bureau of economic analysis the detailed input output structure of the u s economy 1972 volume 1 the use and make of commodities by industries washington d c government printing office 1979 u s treasury department internal revenue service statistics of income source book 1972 processed ward t s the distribution of consumer goods structure and performance new york cambridge university press 1973 weiss leonard w the geographic size of markets in manufacturing this review 54 aug 1972 245 257 case studies in american industry new york john wiley and sons 1980

municipal water supply and sewage treatment costs prices and distortions municipal water supply and sewage treatment utilities in ontario canada are studied in order to establish their costs of supply and evaluate their pricing practices prices charged to residential and commercial customers are found to be only one third and one sixth of the estimated marginal cost for water supply and sewage treatment respectively for example the average price to residential customers is 0 32m superscript 3 while the estimated marginal cost is 0 87 m superscript 3 the estimated cost parameters are combined with estimated residential and nonresidential demands functions in order to calculate approximate welfare losses that arise from overconsumption

a discussion of belgian unemployment combining traditional concepts and disequilibrium econometrics with a gdp of less than 100 billion and exports of more than 60 billion belgium comes perhaps closer than any other country to being a small open economy consequently trends in world trade and export performance have a major impact on domestic activity whereas the impact of domestic fiscal policy is damped by import leakages table 1 presents a few figures confirming these observations

the effect of forest land use on the cost of drinking water supply a spatial econometric analysis forest land use is often associated with the protection of water resources from contamination and the reduced cost of drinking water supply this study attempted to measure the value of the forest on the quality of water resources from a contingent market namely drinking water supply by estimating variations in drinking water costs as a function of variations in land uses spatial correlations were taken into account because of the use of different geographical scales i e water service area and land uses and the potential existence of organizational and technological spillovers between water services we found a significant negative effect of forest land use on water costs we found no evidence of spatial spillovers concerning the management regime but did find that factors related to the scarcity of resources in neighboring water services have an impact on water costs

consumption real exchange rates and the structure of international asset markets abstract international real business cycle irbc models that assume complete asset markets yield strong restrictions for consumption and bilateral real exchange rate series empirical tests with data for the us japan france uk italy canada and sweden suggest that neither the trend behavior nor high frequency movements of consumption and real exchange rates are well explained by irbc models with complete markets it appears however that high frequency fluctuations of consumption and real exchange rates are consistent with unrestricted international trade in risk free bonds

the external wealth of nations measures of foreign assets and liabilities for industrial and developing countries abstract although capital flows are closely monitored surprisingly little is known about the accumulated stocks of foreign assets and liabilities held by various countries especially in the developing world this paper constructs estimates of foreign assets and liabilities and their equity and debt subcomponents for a sample of 67 industrial and developing countries it characterizes the stylized facts of international balance sheets and asks whether there are trends in net foreign asset positions and shifts in debt equity ratios over time finally it explores the sensitivity of estimated stock positions to the treatment of valuation effects not captured in balance of payments data

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

driving forces for consolidation or fragmentation of the us water utility industry a cost function approach with endogenous output abstract this paper empirically analyzes the structure of the us water industry using a multiproduct flexible cost function model with the amount of water delivered to final consumers recognized as endogenous the cross sectional econometric analysis focuses on measures of cost economies in water production and their variation with network characteristics the estimates reveal considerable scale economies in terms of volume particularly for small utilities that tend to have less output density these economies are however counteracted by simultaneous increases in customers and service area size especially for large utilities overall our results indicate that consolidation of small utilities might generate cost efficiencies depending on the concurrent expansion of the network but consolidation of already large utilities without corresponding increases in output density is not likely to be cost effective

risk sharing through capital gains we estimate channels of international risk sharing between european monetary union emu european union and other oecd countries 1992 2007 we focus on risk sharing through savings factor income flows and capital gains risk sharing through factor income and capital gains was close to zero before 1999 but has increased since then risk sharing from capital gains at about 6 is higher than risk sharing from factor income flows for european union countries and oecd countries risk sharing from factor income flows is higher for euro zone countries at 14 reflecting increased international asset and liability holdings in the euro area on examine les canaux de partage international du risque entre l union monetaire europeenne l union europeenne et les autres pays de l ocde 1992 2007 on se concentre sur le partage du risque via les epargnes les flux de revenus des facteurs et les gains de capitaux le partage du risque via les revenus des facteurs et les gains de capitaux a ete presque nul avant 1999 mais s est accru depuis le partage du risque via les gains de capitaux a peu pres 6 est plus grand que le partage du risque via les flux de revenus des facteurs pour les pays de l union europeenne et les pays de l ocde le partage du risque vis les flux de revenus des facteurs est plus eleve pour l euro zone a quelques 14 refletant le fait que les actifs et passifs internationaux detenus dans la zone euro se sont accrus

the persistence of regional unemployment evidence from china the purpose of this paper is to examine the persistence of regional unemployment and to explore the sources of this persistence evidence from china suggests three empirical findings first provincial relative unemployment is more persistent than aggregate unemployment second youth unemployment is less persistent than total unemployment third although the western region has the highest provincial unemployment rate it has the lowest persistence of regional unemployment to explore the sources of this unemployment persistence a panel data method has been developed based on the barro approach and edwards work the higher the share of industry output by state sector and collective sector the more the regional unemployment persistence the private sector is the main employment destination for jobless now and has acted to reduce unemployment persistence

on the alternative explanations of persistence of unemployment in the oecd countries this paper begins with a summary statement of a few relevant facts about the worsening state of unemployment since the mid 1970s in the oecd countries a joint statistical test of the hypotheses of the natural rate hysteresis and the persistence is conducted by pooling annual data 1963 93 from up to 16 oecd countries the results provide strong evidence in support of the persistence hypothesis and the non linearity of the phillips curve while concurrently rejecting the other two alternative explanations

consumption smoothing and housing capital gains evidence from australia canada and new zealand using regional level panel data of three developed countries comprising australia canada and new zealand the study investigates the response of consumption smoothing to housing capital gains t

determinants of risk sharing through remittances abstract the sending of remittances is a decentralised decision of migrant workers nevertheless it has macroeconomic implications in providing insurance against domestic output shocks in the recipient economies a phenomenon known in literature as risk sharing income smoothing using a large sample of 86 developing countries for the period 1990 2010 we establish that remittance inflows serve as an important channel through which risk sharing takes place in the developing world the extent of income smoothing via remittances stands at around 5 on average subsequently we explore the underlying factors that explain countries ability to share risk through remittances the diversification of migrants turns out to be the leading explanation for the extent of risk sharing via remittances the more diverse the migration destinations of a country the higher the amount of risk shared in addition the size of remittance flows appears to have a strong and statistically significant impact on enhancing risk sharing we also find suggestive evidence that a higher proportion of remittances originating from farther countries facilitate more risk sharing compared to those originating from neighbouring or regional economies

what lies beneath the euro s effect on financial integration currency risk legal harmonization or trade abstract although recent research shows that the euro has spurred cross border financial integration the exact mechanisms remain unknown we investigate the underlying channels of the euro s effect on financial integration using data on bilateral banking linkages among twenty industrial countries in the past thirty years we also construct a dataset that records the timing of legislative regulatory harmonization policies in financial services across the european union we find that the euro s impact on financial integration is primarily driven by eliminating the currency risk legislative regulatory convergence has also contributed to the spur of cross border financial transactions trade in goods while highly correlated with bilateral financial activities does not play a key role in explaining the euro s positive effect on financial integration

risk sharing role of foreign aid in developing countries abstractthe effects of foreign aid on economic growth have been extensively investigated over the past 40 years however even though foreign aid can be a significant source of insurance against do

home bias and international risk sharing twin puzzles separated at birth abstract we document that international home bias in debt and equity holdings declined during the period 1993 2003 at the same time as international risk sharing increased using panel data regressions for oecd countries we demonstrate that less home bias is associated with more international risk sharing more generally we show that more financial integration is associated with more risk sharing when we measure financial integration as the ratio of foreign assets to gross domestic product our results indicate that risk sharing and international financial integration are closely related empirical phenomena

spatial effects in econometric practice in environmental and resource economics this paper reviews some methodological and practical issues that arise in the use of spatial econometric techniques in empirical research in environmental and resource economics the focus is on four issues that do not always receive sufficient attention in applied work the statistical implications of using spatially interpolated values in the rhs of models the issue of spatial scale and spatial aggregation the conceptualization of spatial variation in a continuous or discrete space and the modeling of dependence as simultaneous or conditional spatial effects in econometric practice in environmental and resource economics introduction recent years have seen a tremendous increase in the application of geographic information systems and spatial analysis in the social sciences in general goodchild et al 2000 and in applied research in environmental and resource economics in particular bockstael 1996 such research is often characterized by the need to combine data obtained from different sources using different sample designs aggregation conventions and reporting frequencies for example economic variables such as house and land values and the type and volume of agricultural production are collected by means of censuses and surveys designed to accurately portray the distribution of the variable in the population of interest this population pertains to economic agents or aggregates thereof which are typically conceptualized as discrete distinct objects but rarely envisaged in an explicit spatial context in contrast environmental characteristics are often obtained from physical measurements that result from an underlying spatial sampling design examples are satellite imagery used to estimate land use and land cover and readings from sensors at fixed air and water quality monitoring stations the sampling design used for these measures may be optimized to estimate the distribution of the physical phenomenon such as air quality as a spatial continuum or field but has little connection to the framework used to collect economic information in addition neither economic nor physical data collection necessarily matches the spatial scale of the phenomenon under study such as the geographic extent of a market this is a level of complexity that goes well beyond the traditional micro macro distinction in economic analysis the scale mismatch and the inherent need to integrate data from various

wages policy and unemployment in australia it is generally accepted among australian economists that high rates of growth of wages at various times over the last decade have made the achievement of full employment and lower rates of inflation more difficult fear of a further acceleration of wage growth has also been a policy constraint it is when one attempts to go further that considerable disagreement becomes evident from a labour market viewpoint there does not seem to be a consensus as to the answers to the two broad questions that should be addressed first how important are wage changes relative to other factors that depress employment and add to the inflation rate second how does government policy impinge on the process that generates wage changes to do justice to both of these in a paper as short as this one is difficult so i shall focus most of the paper on the second question the relationships between government policy and wage changes are particularly important at this time for most of the last decade successive governments have operated a national wages policy which to a large degree has been based on the indexation of wages for past price changes the latest experiment the prices and incomes accord is the centrepiece of the current government s employment and inflation policy and after almost two years of wide community and media support the key principles upon which it is based are suddenly being questioned 1 our prime endeavour therefore will be to build up sufficient understanding of the wage determination process so that some evaluation can be made as to the effectiveness of these national wage policies this turns out to be a remarkably difficult task which generates considerable concern in our mind that the data may not be sufficiently rich to serve as a basis for sound judgments it does appear however that the effect of a given level of unemployment upon wage changes has consistently weakened over the last decade why this should be so is a major unresolved puzzle i offer a loosely constructed theory that is consistent with the facts but it is by no means the only possible explanation section i provides a description of wage setting in australia and some key facts of the economy in section ii the statistical analysis of wage changes focuses on two competing theories one is the phillips curve approach and the other stresses that wage outcomes may be to a significant degree independent of the level of unemployment and may depend instead on utilization rates of labour within the firm section iii considers the efficacy of incomes policies in australia some final comments areoffered in section iv

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

a water supply cost model incorporating spatial variables this paper presents new evidence on scale economies in multi product firms previous studies are limited in view of recent advances in the theory of the multi product firm the water utility is chosen here as a multi product firm providing multiple

valuation effects and the dynamics of net external assets abstract valuation effects can imply that the traditional current account is an inaccurate measure of the change in the net foreign asset nfa position this paper uses new developments in the analysis of portfolio choice in general equilibrium to investigate valuation effects in a two country model broadly speaking the valuation effects in the model correspond to those observed in the data but there is a key distinction between unanticipated and anticipated valuation effects unanticipated effects can be large dominating the movement in nfa but anticipated effects arise only at higher orders of approximation and are small for reasonable parameterizations