the demographic transition and the emergence of sustained economic growth the demographic transition that swept the world in the course of the last century has been identified as one of the prime forces in the transition from stagnation to growth the unprecedented increase in population growth during the early stages of industrialization was ultimately reversed and the demographic transition brought about a significant reduction in fertility rates and population growth in various regions of the world enabling economies to convert a larger share of the fruits of factor accumulation and technological progress into growth of income per capita this paper examines various mechanisms that have been proposed as possible triggers for the demographic transition assessing their empirical validity and their potential role in the transition from stagnation to growth jel o11 o14 o33 o40 j11 j13

multiple experiments for the causal link between the quantity and quality of children this article presents evidence on the child quantity child quality trade off using quasi experimental variation due to twin births and preferences for a mixed sibling sex composition as well as ethnic differences in the effects of these variables our sample includes groups with very high fertility an innovation in our econometric approach is the juxtaposition of results from multiple instrumental variables strategies capturing the effects of fertility over different ranges for different sorts of people to increase precision we develop an estimator that combines different instrument sets across partially overlapping parity specific subsamples our results are remarkably consistent in showing no evidence of a quantity quality trade off

fertility social mobility and long run inequality dynastic altruistic models with endogenous fertility have been shown to be unable to generate enough intergenerational persistence using a bewley model with endogenous fertility we show that it is possible to recover persistence key ingredients for our result include exponential child discounting discrete number of children diminishing costs of child rearing and an elasticity of intergenerational substitution larger than one our model provides a unified framework of analysis for long run inequality that incorporates fertility choices

incentive compatible regulation of foreign owned subsidiaries a tax simulation for the jamaican bauxite industry abstract in 1974 jamaica replaced the corporate income tax on multinationals in the bauxite sector with a production levy on bauxite in order to increase tax revenue the results were mixed tax revenue jumped initially but the multinationsl quickly started shifting production elsewhere we model jamaica s taxation problem assuming that it has incomplete information about the multinationals costs and derive the optimal incentive compatible tax mechanism we simulate and compare the effects on output and tax revenue of the actual and the incentive compatible tax regimes and conclude that there might be substantial benefits to implementing an incentive mechanism

simple contracts renegotiation under asymmetric information and the hold up problem abstract in this article it is demonstrated that voluntary bargaining over a collective decision under asymmetric information may well lead to ex post efficiency if the default decision is non trivial it is argued that the default decision may be interpreted as a simple contract that the parties have written ex ante this result is used in order to show that simple unconditional contracts which are renegotiated may allow the hold up problem to be solved even if the parties valuations are private information

tax incentives and fertility in canada quantum vs tempo effects using inter jurisdictional differences in the implementation of the family allowance program in canada in the mid 1970s this paper first shows that quebec families with two or more children prior to being exposed to the program responded quite strongly to the added incentives in the short run relative to women in other canadian provinces tracking down the cohorts across censuses we find that the same group of quebec families subsequently showed a decrease in fertility relative to the rest of canada leaving ultimate family size unaffected these results are consistent with the program having generated only a timing effect utilisant les differences entre juridictions dans la mise en uvre du programme d allocations familiales au canada au milieu des annees 70 ce memoire montre d abord que les familles quebecoises qui avaient deux enfants ou plus avant d etre exposees au programme ont repondu tres fortement aux incitations additionnelles a court terme en comparaison avec ce qui s est passe dans les autres provinces canadiennes en suivant les cohortes a travers les recensements on montre que ce meme groupe de familles du quebec a par la suite subi un declin de fecondite par rapport au reste du canada ce qui a eu pour effet de laisser la taille de la famille ultimement non affectee d une maniere relative ces resultats sont coherents avec la conclusion que le programme a seulement eu un effet sur le profil temporel de la fecondite

home equity commitment and long term care insurance demand abstract this paper shows how home equity may substitute for long term care insurance ltci the elderly commonly hold substantial wealth in the form of home equity that is rarely spent before death except for after moves to long term care facilities absent strong bequest motives implies that marginal utility fluctuates less across health states than one would predict based on a standard model without wealth tied up in housing numerical examples show that this asset commitment may substantially weaken ltci demand

home is where the equity is mortgage refinancing and household consumption applying a permanent income model with exogenous liquidity constraints and mortgage behavior household refinancing when mortgage interest rates are historically high and rising a persistent empirical puzzle is explained using data from the panel study of income dynamics households experiencing an unemployment shock and having limited initial liquid assets to draw upon are shown to have been 25 more likely to refinance 1991 94 on average such liquidity constrained households converted over two thirds of every dollar of equity they removed into current consumption as mortgage rates plummeted 1991 94 producing an estimated expenditure stimulus of at least 28 billion

structural change and the fertility transition this paper provides new insights into the relationship between structural change and the fertility transition we exploit the spread of an agricultural pest in the american south in the 1890s as pl

contractual contingencies and renegotiation in a dynamic model of asymmetric information between the owner of a firm and a manager we investigate the optimal set of contingencies on which an incentive contract should depend when renegotiation is possible in particular we characterize the circumstances in which the contracting parties find it desirable to deliberately restrict what the owner can monitor thereby limiting the contractible contingencies our findings thus provide an endogenous explanation for contract simplicity in contrast to those based on transactions costs or bounded rationality

renegotiation and information revelation over time the case of optimal labor contracts the paper analyzes the issue of commitment in grossman and hart s model of optimal labor contracts under asymmetric information about firm profitability we extend their framework by allowing employment to vary over time at equidistant intervals when both parties can precommit ex ante not to renegotiate the contract this replicates the grossman hart outcome each subperiod when precommitment is not possible information revealed through the contract can create pareto improving renegotiation opportunities and the issue of optimal information revelation arises the paper analyzes the impact of ex post pareto improving renegotiations on the optimal contract

do family wealth shocks affect fertility choices evidence from the housing market abstract this paper uses wealth changes driven by housing market variation to estimate the effect of family resources on fertility decisions using data from the panel study of income dynamics we show that a 100 000 increase in housing wealth among home owners causes a 16 to 18 increase in the probability of having a child there is no evidence of an effect of msa level housing price growth on the fertility of renters however we also present evidence that housing wealth growth increases total fertility and that the responsiveness of fertility to housing wealth has increased over time commensurate with the recent housing boom

on renegotiation design a central concern of contract theory is to investigate departures from the first best paradigm in which rational agents could in principle achieve unrestrained efficiency through complete long term contingent contracts in order to take into account some of the observed limitations in real life contracts attention has been paid to informational problems one focus has been on asymmetries of information between contractors adverse selection and moral hazard have been used for example to analyze insurance problems labor contracts managerial incentives regulation of monopolies vertical restraints or the financial structure of firms see for example hartholmstrom 1987 for a survey of these issues attention has also been devoted to private information shared by the parties but unavailable to outsiders like courts that is observable but unverifiable information asymmetries of information between contractors introduce constraints which indeed most often prevent to achieve first best efficiency unfortunately this paradigm involves technical difficulties which explains why most contributions focus on unidimensional asymmetries and may leave some undeterminacies as to the form of optimal contracts e g if there are more than one asymmetry or the size of the inetliciencies there may for instance exist several equilibria which are more or less inefficient the last paradigm observable but unverifiable information is technically more convenient what is not clear however is the extent to which the presence of unverifiable information may prevent achieving first best

the effect of liquid housing wealth on college enrollment this article uses short run housing wealth changes to identify the effect of housing wealth on college attendance i find that households used their housing wealth to finance postsecondary enrollment in the 2000s when housing wealth was most liquid each 10 000 in home equity raises college enrollment by 0 7 of a percentage point on average the effect is localized to lower resource families for whom a 10 000 increase in housing wealth increases enrollment by 5 7 percentage points these estimates imply that the recent housing bust could significantly negatively affect college enrollment through reduction in the housing wealth of families with college age children

optimal labour contracts under asymmetric information an introduction the review of economic studies has instituted a new series of lectures to be given annually by a younger british economist at the association of university teachers of economics meetings the choice of lecturer is determined by a panel whose members are currently professors hahn mirrlees and nobay this paper is a revised version of the first lecture in the series it was presented at the aute meeting held at the university of surrey in april 1982 and was refereed in the usual way mak

human capital fertility and the industrial revolution the industrial revolution and the demographic transition are the two great forces that explain the upward march of modern incomes this paper sets out the empirical realities attempts to unify these events through theories of human capital investment have to meet the major difficulty is to form an explanation which connects them which can also reconcile the seeming differences in fertility behavior over time and in cross section in the pre industrial world the transition period and the modern world jel j1 n3 o4

financial incentives and fertility using panel data on over 300 000 israeli women from 1999 to 2005 we exploit variation in israel s child subsidy to identify the impact of changes in the price of a marginal child on fertility we find a positive statistically significant and economically meaningful price effect on overall fertility and consistent with becker 1960 and becker and tomes 1976 a small effect of income on fertility which is negative at low and positive at high income levels we also find a price effect on fertility among older women suggesting that part of the overall effect is due to a reduction in total fertility

waking up from the american dream on the experience of young americans during the housing boom of the 2000s we exploit regional variations in house price fluctuations in the united states during the early to mid 2000s to study the impact of the housing boom on young americans choices related to home ownership household formation and fertility we also introduce a novel instrument for changes in house prices based on the predetermined industrial structure of the local economy we find that in regions that experienced large increases in house prices between 2001 and 2006 the youngest households were substantially less likely to purchase residential property to be married and to have a child both in 2006 and in 2011

the principal agent problem when the agent has access to outside markets abstract principal agent models assume that the agent must consume the payments he receives under the incentive contract this paper shows that if the agent can trade his payments on frictionless state contigent markets only a flat wage or a full residual claim for the agent are viable

booms and busts consumption house prices and expectations over much of the past 25 years house price and consumption growth have been closely synchronized three main hypotheses for this have been proposed increases in house prices raise household wealth and so their consumption house price growth reduces credit constraints by increasing the collateral available to homeowners and house prices and consumption are together influenced by common factors using microeconomic data we find that the relationship between house prices and consumption is stronger for younger than older households contradicting the wealth channel we suggest that common causality has been the most important factor linking house prices and consumption

cost observability and renegotiation abstract a project requires an initial specific investment the total cost of the project depends on the probability that the supplier will experience a delay in the production schedule this probability is the supplier s private information the buyer would like to hire a supplier with a low probability of delay however it can offer a screening contract only by committing to terminate the project if the supplier is not able to complete it within the original budget limits we show that cost observability may prevent the buyer from terminating a cost overrun project and this in turn prevents screening out bad suppliers thus we provide an example in which superior monitoring ability represents a disadvantage for the buyer this finding contrasts with the common argument that better monitoring represents an advantage of integrated organizations

contract design and non cooperative renegotiation abstract we study a contract design setting in which the contracting parties cannot commit not to renegotiate previous contract agreements in particular we characterize the outcome functions that are implementable for an uninformed principal and an informed agent if having observed the agent s contract choice the principal can offer a new menu of contracts in its place an outcome function can be implemented in this setting if and only if it is optimal for the principal for some belief over agent types which is more pessimistic in the sense of the likelihood ratio order than the prior furthermore the outcome function cannot be too sensitive to variations in the agent s type we show that the direct revelation mechanism which implements such a function when renegotiation can be prevented will also implement it in any equilibrium when it cannot so the standard contract is robust to renegotiation

commitment through renegotiation proof contracts with third parties the paper analyzes contracts as means of strategic commitment that is commitment against outside parties to the agreement it considers the example of an incumbent firm which enters a contractual relationship with its workers in order to deter entry it assumes away the possibility for the parties to precommit not to make pareto improving renegotiations of the agreement once entry has taken place under symmetric information the contract is thus found to be useless for entry deterrence if the incumbent firm or workers possess some private information excessive post entry production levels can however be sustained ex post since output reductions may not be incentive compatible while information asymmetries are usually welfare decreasing when the goal is optimal risk sharing they can thus be welfare improving for the contracting parties when commitment against outsiders is the goal of the contract the role of the renegotiation process as a constraint on sustainable agreements is stressed in the paper and the general relevance of strategic contractual commitment is discussed

early contract renegotiation an analysis of us labor contracts 1970 1995 this article examines the ex post flexibility of us labor contracts during the 1970 95 period by investigating whether unanticipated changes in inflation increase the likelihood of a contract being renegotiated prior to its expiration we find empirical support for this hypothesis specifically our results indicate that renegotiations are triggered principally by large and infrequent price shocks of either sign when combined with evidence that ex ante contract durations are shorter during episodes of increased inflation uncertainty our results suggest that these contracts are flexible both ex ante and ex post to changes in the evolution of inflation

fertility and the personal exemption comment one of the most commonly cited studies on the effect of child subsidies on fertility whittington alm and peters 1990 claimed a large positive effect of child tax benefits on fertility using time series methods we revisit this question in light of recent increases in child tax benefits by replicating this earlier study and extending the analysis we do not find strong evidence to justify the model specification from the original paper moreover even if the original specification is appropriate we show that the results are not robust to more general measures of child tax benefits jel h24 j13

contract renegotiation and coasian dynamics consider a long term relationship between a seller and a buyer whose valuation for a per period service or a durable good is private as trade progresses the valuation will be partially revealed and it may be impossible for the parties to commit ex ante not to take advantage of this we analyse this situation first by supposing that the parties can sign a sequence of short term contracts and secondly by supposing that they can sign a long term contract but cannot commit not to renegotiate it later we find a close relationship in the second case between the optimal long term contract and the non commitment outcome in the standard coasian durable good model our results also have implications for hidden information principal agent models

did the great recession affect fertility examining the impact of job displacements on the timing of births in the united states we examine the impact of job losses during the great recession on fertility in the united states we find that for married cohabiting couples job losses of males during the recession decreased the likelihood of birth in contrast job losses of married cohabiting females had no impact on average on fertility because of opposing age specific effects although younger women were reducing fertility after job losses to cope with the loss of income older women aged 40 and above were more likely to have a child following their job loss moreover we find that job losses of single noncohabiting females decreased the likelihood of birth particularly for women below the age of 25 this negative effect on fertility persisted in the medium term up to three years following the job losses overall these results suggest that job losses during the recession may be partly responsible for the recent decline in the u s birth rates

who marries whom in a surging housing market abstract this paper investigates the impact of a surging housing market on marital sorting our empirical analysis shows that there is increasing assortativeness on original family background in response to housing price appreciation that is for husbands when the down payment doubles one more year of paternal schooling predicts a marriage in which the father in law s schooling is 0 057 year greater than in a scenario in which the down payment does not increase the rising assortativeness could exacerbate the already expanding inequality caused by the booming housing market in addition to the benchmark analysis we find that a divorce reform which awards assets proportionate to the shares the spouses paid for the initial down payment rather than awarding equal shares upon divorce alleviates assortativeness the evidence suggests that joint investment in housing is likely to be a significant consideration in marital sorting

house prices wealth effects and labour supply we examine the impact of house prices on labour supply decisions using uk microdata we combine household survey data with local level house price measures and controls for local labour demand our microdata also allow us to control for individual level income expectations we find significant house price effects on labour supply consistent with leisure being a normal good labour supply responses to house prices are concentrated among young married female owners and older owners this finding suggests that house prices affect the decisions of marginal workers in the economy our estimates imply that house prices are economically important in the participation decisions for these workers

can maternity benefits have long term effects on childbearing evidence from soviet russia this paper quantifies the effects of russia s 1981 expansion in maternity benefits on completed childbearing the program provided one year of partially paid parental leave and a small cash transfe

are children really inferior goods evidence from displacement driven income shocks abstract this paper explores the causal link between income and fertility by analyzing women s fertility response to the large and permanent income shock generated by a husband s job displacement i find that the shock reduces total fertility suggesting that the causal effect of income on fertility is positive a model that incorporates the time cost of children and assortative matching of spouses can simultaneously explain this result and the negative cross sectional relationship i also find that a husband s displacement accelerates childbearing which is consistent with lifecycle models of fertility in which the incentive to delay is driven by expected earnings growth

unimprovable allocations in economies with incomplete information abstract the paper considers an exchange economy with incomplete information in which agents can retrade goods until all gains from trade are exhausted unimprovable allocations are defined to be those allocations from which agents would not wish to deviate either by retrading goods or by revealing further information the concept of unimprovability is then used to analyze a lemons market and an adverse selection insurance market in which agents can renegotiate after information has been revealed finally unimprovability is compared to different concepts of efficiency and to the concept of durability journal of economic literature classification number d82

did expanding the eitc promote motherhood during the 1990 s the earned income tax credit eitc emerged as a primary means of providing income support for low income families in the united states in an effort to keep the program well targeted the credit largely restricts eligibility to tax filers with children one potentially unintended consequence of this design is that it might encourage childbearing we raise the question of whether the eitc through its generous benefits to families with children actually increases fertility we approach this topic for three reasons the first is to expand upon an existing literature of economic incentives and fertility using the eitc expansion as a large exogenous variation in the price of childbearing findings in the welfare literature are inconclusive robert a moffitt 1998 and the income tax literature typically finds small but statistically significant effects of the income tax system on fertility behavior e g leslie a whittington et al 1990 second declining fertility rates in many western counties raise the general issue of whether the tax system can be used as a tool for encouraging fertility finally by considering the link between the eitc and fertility we question a common yet untested assumption in the literature on the eitc and the labor supply of single parents that the presence of a child is exogenous to the value of the eitc

economic reform and dynamic political constraints in this paper we examine the impact of political constraints on economic reform plans with special reference to the transition from centrally planned to market economies we analyse the problem of an agenda setting reform minded government facing a bureaucracy or industrial sector for which allocative efficiency requires redundancies and an increase in work intensity the government also tries to minimize the rents conceded to its heterogeneous workforce we examine two types of political constraints unanimity rule and majority rule both in a one period and a two period horizon the main results are the following first of all we show how adverse selection and time consistency may generate the widely observed feature of gradualism as an ingredient of an optimal reform second under a majority rule it is shown to be possible for the government to obtain a majority vote for a reform scheme that intertemporally hurts majority interests indeed the government can improve rent extraction through the strategic use of the threat of future proposals the group which expects to be in the minority tomorrow may accept concessions while its votes can be used to extract rents from another group these results suggest that in a dynamic context democratic constraints should not be overestimated as an obstacle against efficiency enhancing economic reforms the results of this paper may throw some light on the political economy of current reforms in eastern europe governments and political decision makers in general always face political constraints when elaborating reform proposals they know that the need to overcome potential opposition from various groups of the population constrains proposals for change political constraints vary depending on the specific institutional structure of society and are clearly different under a military dictatorship than under a parliamentary democracy the role of political constraints seems particularly important in eastern europe today where new democratic governments face the huge task of achieving the transition to a market economy while the introduction of democracy may have removed some important obstacles to economic change namely the veto power of a powerful nomenclatura under communist one party rule fears are expressed that it could potentially jeopardize economic reforms which may during the transition period hurt a majority of the population what can economic theory tell us about optimal economic reform under political constraints this paper starts addressing this ambitious question by looking at structural reform focusing on a restructuring of economic sectors which requires massive redundancies and a significant rise in labour productivity our model illustrates the case of planning

subsidizing the stork new evidence on tax incentives and fertility this paper exploits the introduction of a pronatalist transfer policy in the canadian province of quebec that paid up to c 8 000 to families having a child i implement a quasi experimental strategy by forming treatment and control groups defined by time jurisdiction and family type the incentive was available broadly rather than to a narrow population as studied in previous work providing an exceptional opportunity to investigate heterogeneous responses i find a strong effect of the policy on fertility and some evidence of a heterogeneous response that may help reconcile these results with previous estimates

optimal contracts when enforcement is a decision variable this paper analyzes choice theoretic costly enforcement in an intertemporal contracting model with a differentially informed investor and entrepreneur an intertemporal contract is modeled as a mechanism in which there is limited commitment to payment and enforcement decisions the goal of the analysis is to characterize the effect of choice theoretic costly enforcement on the structure of optimal contracts the paper shows that simple debt is the optimal contract when commitment is limited and costly enforcement is a decision variable theorem 1 in contrast stochastic contracts are optimal when agents can commit to the ex ante optimal decisions theorem 2 the paper also shows that the costly state verification model can be viewed as a reduced form of an enforcement model in which agents choose payments and strategies as part of a perfect bayesian nash equilibrium

the impact of housing markets on consumer debt credit report evidence from 1999 to 2012 we estimate the response of consumer debt portfolios to pronounced housing market swings from 1999 to 2012 using equifax sourced credit report data and a variety of identification approaches we find i the extraordinary climb in home equity debt from 2002 to 2006 is an expression of a stable longer term relationship between house price growth and home equity borrowing ii all preboom homeowners and older and prime postboom homeowners demonstrate near dollar for dollar substitution between expensive credit card and cheap home equity debt in response to home equity changes and iii little evidence of substitution between home equity and student loan debt

changing world prices women s wages and the fertility transition sweden 1860 1910 this time series analysis examines during 1860 1910 the impact of changes in local prices of agricultural commodities on wages among men and women in sweden and the impact of changes in wages on fertility decline child mortality urbanization and improved social conditions linear ordinary least squares models are set up to determine whether demand induced increases in womens wages relative to mens are significant factors in explaining swedish total fertility rates data are obtained from 25 counties and the city of stockholm among pooled observations for six time periods during 1860 64 and 1910 14 this period is marked by a total fertility decline of 28 a marital fertility decline of 26 and a child mortality decline of 52 explanatory variables are the relative prices of main agricultural outputs employment outside of agriculture the proportion of urban population and the child mortality rate findings indicate a significant relationship between child mortality and total fertility and specific fertility rates among women aged 20 39 years a doubling of the male real wage rate was significantly associated with earlier marriage higher birth rates among women aged 15 29 years and lower birth rates among women aged 35 49 years the ratio of male wages to female wages was associated with a decline in birth rates at all ages with the exception of teenagers 66 of fertility increase was due to declines in child mortality but this increase was counterbalanced by fertility decline among older women child mortality and urbanization depressed marital fertility male wages increased the proportion married a 10 increase in the male female wage rate was associated with a 25 reduction in the total fertility rate another 25 increase in the male female wage rate was associated with a 50 reduction in child mortality it is concluded that the value of womens time had a key impact on the swedish fertility transition

escaping malthus economic growth and fertility change in the developing world following mid twentieth century predictions of malthusian catastrophe fertility in the developing world more than halved while living standards more than doubled we analyze how fertility change related to economic growth during this episode using data on 2 3 million women from 255 household surveys we find different responses to fluctuations and long run growth both heterogeneous over the life cycle fertility was procyclical but declined and delayed with long run growth fluctuations late but not early in the reproductive period affected lifetime fertility the results are consistent with models of the escape from the malthusian trap extended with a life cycle and liquidity constraints

behavioural microsimulation with labour supply responses this paper provides a technical survey of recent developments in behavioural microsimulation we discuss the criteria by which models of labour supply may be chosen for application to behavioural microsimulation and consider how such models may be augmented to control for fixed costs child related work costs preference heterogeneity and endogeneity in wages we describe methods by which non linear budget constraints may be accommodated in estimation policy simulations and welfare analysis and discuss how stochastic terms may be factored into the simulation of behavioural responses to a policy shock copyright 2002 by blackwell publishers ltd

are children normal abstract we examine becker s 1960 contention that children are normal for the cross section of non hispanic white married couples in the united states we show that when we restrict comparisons to similarly educated women living in similarly expensive locations completed fertility is positively correlated with the husband s income the empirical evidence is consistent with children being normal in an effort to show causal effects we analyze the localized impact on fertility of the mid 1970s increase in world energy prices an exogenous shock that substantially increased men s incomes in the appalachian coal mining region empirical evidence for that population indicates that fertility increases with men s income

the effect of legalizing retail marijuana on housing values evidence from colorado does legalizing retail marijuana generate more benefits than costs this paper provides a first step toward addressing that question by measuring the benefits and costs that are capitalized into housing values we exploit the time series and cross sectional variations in the adoption of colorado s municipality retail marijuana laws rmls and examine the effect on housing values with a difference in differences strategy our estimates show that the legalization leads to an average 6 increase in housing values indicating that the capitalized benefits outweigh the costs in addition we find suggestive evidence that this relatively large housing value appreciation is likely due to rmls inducing strong housing demand while having no discernible effect on housing supply finally we show that the effect of rmls is heterogeneous across locations and property types jel k20 r28

the unintended effects of place based programs fertility and health effects of urban empowerment zones abstract whether place based welfare programs affect fertility and health outcomes is an understudied question i estimate the health impacts of the empowerment zone ez program a federal program that gave sizeable grants and tax breaks to certain high poverty census tracts in selected cities using difference in differences methods i find that the ez program decreased fertility rates by 11 percent and improved birth outcomes compositional changes in fertility likely cannot explain changes in infant health recent research on the later life impacts of low birth weight suggest that the health impacts of this program may have substantial long term benefits

renegotiation design with multiple regulators abstract one striking feature of the internal organization of governments is the existence of multiple regulators this paper explains this organizational choice as coming from the government s limited ability to commit the separation of powers between two regulators is modeled as a stackelberg common agency game with respect to the case of a single regulator the allocative efficiency and the regulated firm s informational rent are both reduced in the unique equilibrium of this game however when regulators have a limited ability to commit this static cost of regulators separation becomes a dynamic benefit separation makes renegotiation harder and improves commitment journal of economic literature classification numbers d82 l51