optimization of replenishment policies for decentralized and centralized capacitated supply chains under various demands abstract in this paper the optimal replenishment policies of capacitated supply chains sc operating under two different control strategies decentralized vs centralized and various demands are determined and insights useful to management are discussed the details of the system used including the underlying supply chain inventory model and the simulation based optimization framework are presented the effectiveness and efficiency of the proposed optimization framework is illustrated by comparing it with brute force estimation of the true optimum on three selected scenarios the entire study was carried out by following a design of experiment covering ten demand patterns four levels of capacity constraints and two control strategies the main and two factor interaction effects were analyzed via anova detailed analyses of the ordering patterns cost distribution over the sc and internal service level were carried out to provide useful insights for demand with high variation capacity constraint may lead to significant changes in ordering patterns failing to detect those changes may lead to unnecessary cost increase overall it is beneficial to adopt centralized control and cost savings realized are dependent upon the demand patterns an incentive mechanism is proposed to coordinate the decentralized system so that each player in the sc will be better off additional experiments were also carried out to investigate the effect of using different allocation rules by the distributor

the role of information on retirement planning evidence from a field study i introduction modern financial planning is dominated by discussions of one topic retirement savings retirement planning behaviors are widely studied yet population data show perplexing patterns of savings especially among households who reasonably should expect to live long and healthy lives after separating from the workforce savings choices are increasingly focused on the decisions of individuals rather than on public plans or employer mandated pensions poterba 2014 however policymakers attempts to stimulate more individual level savings have not shown strong effects duflo et al 2007 one problem appears to be related to people failing to fully plan ahead for retirement and neglecting longer run financial management in general ameriks caplin and leahy 2003 according to the employee benefit research institute 2015 more than one in four workers have less than 1 000 in retirement savings fewer employees today have access to defined benefit pensions than they did in the past and instead rely on employer based 401 k savings accounts and nonemployer based individual retirement accounts iras munnell 2006 however participation rates remain low 43 of private sector workers of age 25 64 take part in retirement savings programs calabrese 2011 even among active savers there are concerns about how well people are able to manage their retirement accounts in ways that reflect optimal planning horizons several policies have been designed to increase participation in retirement plans first firm level programs requiring employees to opt out vs opt in to a 401 k plan have increased participation in retirement savings plans madrian and shea 2001 however as choi laibson and madrian 2011 highlight because individuals have heterogeneous savings preferences these default options may be costly to individuals as some might save more in the absence of the default and others might prefer to save less second government designed tax breaks for individuals investing in retirement accounts and increases in maximum income deferral limits for these accounts could increase retirement savings however income tax deductions and credits can be costly tax expenditures and individuals especially lower and middle income savers may not respond to these incentives engen gale and scholz 1996 third firms can try to help people better understand their savings options and make plans for retirement effectively lowering the costs of information with workshops and or counseling retirement planning requires information in order to form expectations about lifetime income years of work expected investment returns adjusted for risk and consumption levels in retirement people who lack information about these issues may fail to make a plan or proceed to design a plan based on incomplete information educational programs targeted to workers hold promise to help people recalibrate their expectations and shift their savings behavior well targeted financial education might facilitate people to pursue their individual retirement saving preferences in ways that default rules or incentives alone cannot this article studies the effect of financial education on retirement savings offered to employees in an online format online information offers several advantages over traditional seminars for example online courses can be delivered to a large audience and at a lower cost per participant than classroom delivery it also poses relatively low marginal costs to the employee because of the flexibility and convenience of the mode of delivery it may serve employees who would not attend in person sessions while participants in online education do not benefit from group interactions online delivery provides participants privacy to explore financial issues that they might shy away from in more public settings several studies document that employer based education is associated with improvements in employees financial knowledge clark and d ambrosio 2002 holland goodman and stich 2008 skimmyhorn forthcoming

a new age based replenishment policy for supply chain inventory optimization of highly perishable products abstract a simulation optimization framework is proposed for supply chain inventory management of highly perishable products a new replenishment policy based on old inventory ratio is developed hence called oir policy it is an age based policy using only partial age information to measure the freshness of the entire inventory the efficiency of the new policy is evaluated in detail for a single vendor multi buyer platelet with a limited shelf life of 5 days supply chain the inventory objective is to minimize the expected system outdate rate under a predetermined maximal allowable shortage level the new oir policy is compared with two existing order up to policies one is the order up to policy without age consideration the other one is the ewa policy developed by broekmeulen and van donselaar 2009 the three policies are compared under both decentralized and centralized controls for different levels of the fillrate constraint the computational results show that adopting centralized control over the whole platelet supply chain greatly helps in reducing the system expected outdate rate from 19 6 down to 1 04 on average while keeping sufficiently high fill rate at each entity the two policies with age consideration are generally better than the policy without age consideration under both control strategies this is particularly true for decentralized control the new oir policy is recommended because it is the best among all three consistently yielding good results in all cases studied

risk pooling between households and risk coping measures in developing countries evidence from rural bangladesh abstract using data from rural bangladesh i test whether income risks are pooled among villagers between neighboring households and between related households living in different villages i find evidence that risks to food consumption are pooled between neighboring households and between related households but not among villagers as for nonfood consumption i find little evidence of risk pooling except between unrelated neighboring households i also find that while households belonging to a neighborhood network do not take any special measures during an economic hardship those not belonging to any such network try to smooth consumption by selling off livestock and other assets and by getting interest free loans negative income shocks are found to have little effect on labor supply or private transfers

joint economic lot sizing problem for a three layer supply chain with stochastic demand abstract this paper considers the joint economic lot sizing problem jelp for multi layer supply chain with multi retailers and single manufacturer and supplier the paper extends the work of ben daya et al 2013 and relaxes the assumption of deterministic demand and constant holding and ordering costs the paper proposes modifying four computational intelligent algorithms to solve mixed integer problems and compares their performance for solving the problem at hand the paper further compares between adopting a centralized safety stock policy versus a decentralized policy results showed cuckoo search to outperform other tested algorithms and also favored adopting a centralized policy

financial literacy and mortgage equity withdrawals abstract mortgage equity withdrawals mew are correlated with covariates consistent with a permanent income framework augmented for credit constraints we assess linkages between mew and financial literacy education using the health and retirement study hrs and panel study of income dynamics psid we find that the financially literate are 3 5 percentage points less likely to withdraw housing equity via non home equity loan mortgages using the hrs while college graduates are 5 percentage points less likely than those without a high school degree in the psid among those withdrawing housing equity in the psid college graduates extract significantly less equity and are less likely to have high levels of housing leverage after doing so

are real interest rates equal across countries an empirical investigation of international parity conditions this paper conducts empirical tests of the equality of real interest rates across countries the empirical evidence strongly rejects the hypothesis of real rate equality and the joint hypotheses of uncovered interest parity and ex ante relative ppp or the unbiasedness of forward rate forecasts and ex ante relative ppp the evidence suggests that it is worth studying open economy macroeconomic models which allow 1 domestic real rates to differ from world rates 2 time varying risk premiums in the forward market or 3 deviations from ex ante relative ppp the relationship of real interest rates across countries is of central importance to our understanding of open economy macroeconomics in some models where there is costless international arbitrage in goods and financial assets real interest rates for comparable securities should be equal across countries this has been a feature of much of the early research in the monetary approach to exchange rates e g frenkel 11 and bilson 2 on the other hand finance theory indicates that risk premia may well differ for comparable securities denominated in different currencies solnick 27 roll and solnick 26 stulz 28 fama and farber 7 hansen and hodrick 17 and dornbusch 6 and more recent theoretical models in the exchange rate literature such as dornbusch 5 frankel 10 and mussa 24 depend on real rates differing between countries in the short run the proposition that real rates are equal across countries is worth studying

labour market institutions and household consumption insurance within oecd countries this paper tests empirically whether the effect of idiosyncratic income shocks on aggregate consumption depends on institutional features of national labour markets the results show that in a sample of 15 oecd countries institutional heterogeneity is a significant determinant of the response of household consumption to country specific income shocks this is consistent with the idea that institutionally provided social insurance may help increase income stability when people differ in their ability to access financial markets and smooth consumption fluctuations

growth and risk sharing with private information abstract we examine the impact of incomplete risk sharing on growth and welfare the source of market incompleteness in our economy is private information a household s idiosyncratic productivity shock is not observable by others risk sharing between households occurs through long term contracts with intermediaries we find that incomplete risk sharing tends to reduce the rate of growth relative to the complete risk sharing benchmark numerical examples indicate that the welfare cost and the growth effect of private information are small

the economic importance of financial literacy theory and evidence this paper undertakes an assessment of a rapidly growing body of economic research on financial literacy we start with an overview of theoretical research which casts financial knowledge as a form of investment in human capital endogenizing financial knowledge has important implications for welfare as well as policies intended to enhance levels of financial knowledge in the larger population next we draw on recent surveys to establish how much or how little people know and identify the least financially savvy population subgroups this is followed by an examination of the impact of financial literacy on economic decision making in the united states and elsewhere while the literature is still young conclusions may be drawn about the effects and consequences of financial illiteracy and what works to remedy these gaps a final section offers thoughts on what remains to be learned if researchers are to better inform theoretical and empirical models as well as public policy jel a20 d14 g11 i20 j26

risk sharing with limited commitment and preference heterogeneity structural estimation and testing in order to analyze the role of limited commitment and preference heterogeneity in explaining the consumption allocation i propose a theoretical and empirical framework to estimate and evaluate a risk sharing model where insurance transfers have to be self enforcing and the coefficient of relative risk aversion may depend on observable household characteristics i compare this model to benchmark models with full commitment and or without preference heterogeneity using data from three indian villages i find that the limited commitment model with heterogeneous preferences outperforms the benchmark models in a statistical sense and in terms of i explaining the dynamic response of consumption to idiosyncratic income shocks ii accounting for the variation of consumption unexplained by household and time effects and iii capturing the variation of inequality across time and villages and predicting changes in inequality i also use the estimated models to predict the effects of a counterfactual tax and transfer policy on the consumption allocation the limited commitment model with preference heterogeneity predicts larger benefits to the poor than its homogeneous counterpart

employee financial literacy and retirement plan behavior a case study this article uses administrative data on all active employees of the federal reserve fr system to examine participation in and contributions to the thrift saving plan the system s defined contribution dc plan we link to administrative records a unique employee survey of economic demographic factors including a set of financial literacy questions not surprisingly fr employees are substantially more financially literate than the population at large most importantly financially savvy employees are also most likely to participate in their dc plan sophisticated workers contribute three percentage points more of their earnings to the dc plan than do the less knowledgeable and they hold more equity in their pension accounts we examine changes in employee plan behavior 1 year after employees completed a learning module about retirement planning and we compare it to baseline patterns we find that those employees who completed the learning module were more likely to start contributing and less likely to have stopped contributing to the dc plan postsurvey in sum employer provided learning programs are shown to significantly impact employee retirement saving decisions and consistent with a lot of other research higher levels of financial literacy are found to have a beneficial impact on retirement saving patterns jel j3 h7

the role of financial literacy in determining retirement plans nber working paper seriesthe role of financial literacy in determining retirement plansrobert clarkmelinda sandler morrillsteven g allenworking paper 16612http www nber org papers w16612national bureau of economic research1050 massachusetts avenuecambridge ma 02138december 2010this research is funded in part by a grant from finra investor education foundation we wouldlike to thank jennifer maki mehtab randhawa and evan rogers for their research assistance theresearch could not have been accomplished without the cooperation of the companies that partneredwith us we would also like to thank nicholas horsewood annamaria lusardi olivia mitchell andtwo anonymous referees for useful comments all remaining errors are our own the views expressedherein are those of the authors and do not necessarily reflect the views of the national bureau of economicresearch finra investor education foundation or any of its affiliated companies 2010 by robert clark melinda sandler morrill and steven g allen all rights reserved shortsections of text not to exceed two paragraphs may be quoted without explicit permission providedthat full credit including notice is given to the source

baby boomer retirement security the roles of planning financial literacy and housing wealth abstract we compare wealth holdings across two cohorts of the health and retirement study the early baby boomers in 2004 and individuals in the same age group in 1992 levels and patterns of total net worth have changed relatively little over time though boomers rely more on housing equity than their predecessors most important planners in both cohorts arrive close to retirement with much higher wealth levels and display higher financial literacy than non planners instrumental variables estimates show that planning behavior can explain the differences in savings and why some people arrive close to retirement with very little or no wealth

social interactions in asset allocation decisions evidence from 401 k pension plan investors abstract this paper investigates social interaction effects on individual asset allocation decisions using a rich dataset of 159 329 individuals enrolled in 401 k plans we find that individuals are likely to increase decrease their risk shares when their coworkers have higher lower risk exposures over the last quarter the social interaction effects are especially strong among individuals with extreme asset allocations and low equity investment performance we also divide the workplaces into subgroups to examine how social interaction effects vary among coworkers with different backgrounds results from additional tests indicate that estimated social interaction effects are not primarily driven by common preferences common environments or reverse causality

financial integration and international risk sharing abstract conventional wisdom suggests that financial liberalization can help countries insure against idiosyncratic risk there is little evidence however that countries have increased risk sharing despite widespread financial liberalization we show that the key to understanding this puzzling observation is that conventional wisdom assumes frictionless international financial markets while actual markets are far from frictionless financial contracts are incomplete and contract enforceability is limited when countries remove official capital controls default risk is still present as an implicit barrier to capital flows if default risk were eliminated capital flows would be six times greater and international risk sharing would increase substantially

implications of endogenous group formation for efficient risk sharing the existing literature on sub game perfect risk sharing suffers from a basic inconsistency while a group of size n is able to coordinate on a risk sharing outcome it is assumed that deviating subgroups cannot i relax this assumption and characterise the optimal contract among all coalition proof history dependent contracts this alters the predictions of the standard dynamic limited commitment model i show that the consumption of constrained agents depends on both the history of shocks and its interaction with the current income of other constrained agents from this i derive a formal test for the presence of endogenous group formation under limited commitment

effectiveness of employer provided financial information hiring to retiring in order to maximize lifetime utility workers must make choices throughout their careers to plan and save for retirement with the aging of the baby boomers and increasing life expectancies it is more important than ever for individuals to ensure they have adequate savings and resources for retirement to make optimal choices individuals need sufficient knowledge of how both national and employer provided retirement plans work and what benefits they should expect further they must have adequate financial literacy to navigate complex financial instruments and to understand the importance of various plan characteristics traditional models of life cycle earnings and consumption are based on the assumption that workers are aware of investment options understand the benefits they will receive from various retirement plans and have the ability to assess the impact of their saving decisions

risk sharing within families evidence from the health and retirement study abstract we report strong empirical support for the presence of self interest based risk sharing within extended families in the u s a standard model of self interest based risk sharing predicts that the share of current family income consumed by a child positively depends on that child s permanent income it follows that parental transfers to children that are expected to earn more over the period of risk sharing arrangements should exhibit less sensitivity to the recipient s income fluctuations we test this distinguishing prediction of self interest based risk sharing by exploiting the variation of transfer receipts among siblings observed over 17 years of longitudinal data spanned by the health and retirement study

risk coping and starvation in rural china we use a 3 year panel from two poor provinces in southern china to examine the nature of risks to which rural households are exposed and their ability to insure calorie consumption and spending of total consumption against idiosyncratic shocks to their income we find that idiosyncratic risks are indeed the main source of income variation in the sample consumption is better insured than total spending unlike total spending where full insurance is rejected in most cases calorie intake is completely insured for both land rich and land poor households in both provinces access to even modest amounts of land significantly enhances households ability to guard against total spending land rich households are much better insured against total spending than land poor households the results are robust across model specifications although generalized method of moments gmm estimations increase the magnitude of difference in total spending between the land rich and the land poor policies targeting poverty red

analysis of batch ordering inventory models with setup cost and capacity constraint abstract stochastic periodic review batch ordering inventory problems appear in many industrial settings however few literature deals with the optimal ordering polices for such problems no mention to the inclusion of the fixed ordering cost and the production capacity in this paper we consider a single item periodic review batch ordering inventory system with the consideration of the setup cost and the capacity constraint for each order over a finite planning horizon by proposing several new convex notions we show that a batch based s s policy is optimal for the unlimited ordering capacity case while for the limited ordering capacity case a modified r q policy is optimal for the setting with zero ordering setup cost and a batch based x y band policy for the setting with positive ordering setup cost moreover we analytically study the sensitivity of the policy parameters with respect to the capacity and batch order size and derive the bounds on the optimal policy parameters we further extend our analysis to the infinite horizon setting and show that the structure of the optimal policy remains similar finally the numerical experiments provide some insights into the impact of model parameters on the benefit of reducing the batch size and increasing the ordering capacity and indicate that ignoring batch requirement may lead to a significant cost increment

consumption patterns as a measure of capital mobility evidence from some apec countries consumption patterns are used to measure capital mobility within the apec region both on a bilateral and multilateral basis two models are estimated by iv sur and ols using quarterly data for four countries the us japan canada and australia the results show that the hypothesis of perfect capital mobility is rejected and some results even indicate autarky it is argued however that the hypothesis of perfect capital mobility is unreasonable and that the consumption criterion is inappropriate because it assumes real interest equalization

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

impacts of forecast inventory policy and lead time on supply chain inventory a numerical study abstract this paper first proposes the use of metaheuristic to combine with exponential smoothing methods in forecasting future demands and in determining the optimal inventory policy values for each node in a supply chain network based on historical demand or order streams without the need of any prior knowledge about the demand distribution or distribution fitting the effects of five demand forecasting methods two inventory policies and three lead times on the total inventory cost of a 3 echelon serial supply chain system are then investigated the effect of sharing the demand information for planning the inventories is also compared with that of no sharing for testing 15 quarterly and 15 monthly time series were taken from the m3 competition and are considered as the multi item demand streams to be fulfilled in the supply chain the results indicate that 1 the damped pegel forecasting method is the best in terms of prediction errors because it outperforms others in three of five measures followed by the simple exponential smoothing that wins one of the remaining two and ties the damped pegel in one 2 the supply chain inventory cost increases with increasing lead time and echelon level of the supply chain when the s s policy is used but not the r q policy 3 the r q inventory policy generally incurs lower supply chain inventory cost than the s s policy 4 sharing demand information reduces inventory cost and the reduction is higher for s s than for r q 5 the best demand forecasting method for minimizing inventory cost varies with the inventory policy used and lead time and 6 the correlation between forecasting errors and inventory costs is either negligible or minimal

consumption risk sharing in italy this paper analyses the issue of consumption risk sharing in the 20 italian regions during the period 1983 94 the tests proposed allow for regional specific departures from the hypothesis of complete risk sharing and for the existence of non separabilities among groups of commodities empirical evidence suggests the rejection of the hypothesis of complete consumption risk sharing

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

intertemporal choice and consumption mobility the theory of intertemporal consumption choice makes sharp predictions about the evolution of the entire distribution of household consumption not just about its conditional mean in the paper we study the empirical transition matrix of consumption using a panel drawn from the bank of italy survey of household income and wealth we estimate the parameters that minimize the distance between the empirical and the theoretical transition matrix of the consumption distribution the transition matrix generated by our estimates matches remarkably well the empirical matrix both in the aggregate and in samples stratified by education our estimates strongly reject the consumption insurance model and suggest that households smooth income shocks to a lesser extent than implied by the permanent income hypothesis jel d52 d91 i30

networks in economic development this chapter surveys the implications of some studies in network economics research for economic development we focus on information flow and risk sharing two topics where work in theory empirics and policy analysis have been especially intensive and complementary in analysing information we distinguish models of information diffusion and aggregation highlight how different models imply very different guidance regarding the right way to seed information in discussing risk sharing we look at the key frictions that impede efficient informal insurance and some potential unintended consequences when policymakers intervene to help throughout we stress practical insights that can be used with limited measurement of the details of networks

contingent loan repayment in the philippines abstract using data from the philippines this article seeks to understand how households in the study area apparently manage to avoid falling into a debt trap in spite of frequent borrowing findings suggest that this is achieved via three institutional features first most informal debt carries no interest second for all debts repayment is postponed in case of a borrower s difficulty this is the only insurance feature of debt repayment third while debt principal is seldom forgiven or reduced interest bearing debt does not carry additional interest if debt repayment is delayed this prevents interest charges from accumulating and debt from snowballing

from earnings inequality to consumption inequality this paper studies the paths from inequality in earnings to inequality in household consumption we show that careful study of the evolution of the variances and covariances of earnings and consumption within cohorts across time can identify permanent and transitory shocks we present an application to the evolution of inequality in the united kingdom we extend previous results to recognise separate earnings of partners in couples

insuring consumption against illness one of the most sizable and least predictable shocks to economic opportunities in developing countries is major illness we investigate the extent to which families are able to insure consumption against major illness using a unique panel data set from indonesia that combines excellent measures of health status with consumption information we find that there are significant economic costs associated with major illness and that there is very imperfect insurance of consumption over illness episodes these estimates suggest that public disability insurance or subsidies for medical care may improve welfare by providing consumption insurance

savings investment and international capital flows abstract the high correlation between national savings and domestic investment rateshas been interpreted as evidence that capital is not internationally mobile this paper surveys the theory and evidence on the relationship between savings and investment in a sample of 23 oecd countries a positive correlation between savings and investment rates is found in both the short and long runs however a wide variety of models generate such co movements in savings and investment in response to exogenous disturbances even under conditions of complete financial markets thus the savings investment correlation provides little evidence on the question of international capital mobility

long term wage fluctuations with industry specific human capital exploiting long term interindustry demand shifts this article provides evidence that 1 industry level wages do not respond to industry demand conditions 2 at the industry level the employment of young workers responds more to demand shifts than does the employment of experienced workers and 3 the postdisplacement wages of displaced workers are strongly affected by demand in their predisplacement industries these findings are consistent with a model in which worker s investments in industry specific skills pose a barrier to interindustry labor mobility and wages do not respond to spot labor market conditions

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

on the fiscal policy implications of low capital mobility some further evidence from cross country time series data in an attempt to determine whether an increase in a nation s private saving stimulated say by tax policies raises domestic investment or flows abroad feldstein and horioka 4 and feldstein 2 examined the relationship between the saving and investment rates of a sample of industrialized countries their results pointed to the existence of a strong almost one to one relationship between investment and saving rates they interpreted that finding as implying that the assumption of perfect capital mobility is invalid in that sustained increases in domestic saving rates induce approximately equal increases in domestic investment rates 2 150 the finding has farreaching implications for instance with low international capital mobility a country s growth prospects are tied to its saving effort if the saving effort is weak relative to investment opportunities realized investment rates could fall short of their potential and thus impact adversely on growth it also implies that fiscal deficits lead to neoclassical crowding out of investment so that both the keynesian view as well as the ricardian equivalence proposition do not hold since the feldstein and horioka henceforth denoted by fh article numerous papers have offered alternative explanations for the strong saving investment correlations many of those explanations center on supposed weaknesses of the econometric methodology employed by fh and feldstein one of the arguments initially proposed by fieleke 5 and tobin 19 is the policyresponse argument according to that argument if the government adjusts its policy instruments to offset current account imbalances a strong positive correlation between saving and investment would result however that correlation reflects the policy response and not low capital mobility in a recent paper summers 16 proposed a direct test of that argument and his empirical results