analysis of seat allocation and overbooking decisions with hybrid information abstract we investigate a single leg airline revenue management problem where an airline has limited demand information and uncensored no show information to use such hybrid information for simultaneous overbooking and booking control decisions we combine expected overbooking cost with revenue then we take a robust optimization approach with a regret based criterion while the criterion is defined on a myriad of possible demand scenarios we show that only a small number of them are necessary to compute the objective we also prove that nested booking control policies are optimal among all deterministic ones we further develop an effective computational method to find the optimal policy and compare our policy to others proposed in the literature

the role of investment specific technological change in the business cycle this is a quantitative investigation of the importance of technological change speci c to new investment goods for postwar us aggregate uctuations a growth model that incorporates this form of technological change is calibrated to us data and simulated using the relative price of new equipment to identify the process driving investmentspeci c technology shocks the analysis suggests that this form of technological change is the source of about 30 of output uctuations 2000 elsevier science b v all rights reserved

market structure and the value of overselling under stochastic demands in the operations management literature traditional revenue management focused on pricing and capacity allocation strategies in a two period model with stochastic demand inspired by travel and lodging industries we examine a two period model in which each seller may also adopt the overselling strategy to customers whose valuations are differentiated by timing of arrivals widely seen as a popular hedge against consumers skipping reservations we extend the stylized approaches of biyalogorsky carmon fruchter and gerstner 1999 and lim 2009 to understand the value of overselling under various market structures we find that contrary to existing literature the impact of period two pricing competition from overselling spills over to period one such that overselling may not always be a weakly dominant strategy once unlimited early demand ceases to hold in a duopoly regime we provide some numerical studies on the existence of multiple equilibria at the capacity allocation level which actually lead to different selling strategies at the equilibrium despite identical market conditions and firm characteristics

a survey on risk averse and robust revenue management abstract many industries use revenue management to balance uncertain stochastic demand and inflexible capacity popular examples include airlines hotels car rentals retailing and manufacturing the classical revenue management approaches considered in theory and practice are based on two assumptions first demand as the only uncertain variable follows a known distribution and second risk neutrality justifies the maximization of expected revenue recently two related streams of literature emerged that do not need these assumptions research on risk averse revenue management acknowledges that in practice many decision makers are risk averse research on robust revenue management focuses worst case scenarios without a known demand distribution which is especially relevant for new and extremely unstable businesses this paper motivates the consideration of risk averse and robust revenue management we briefly introduce revenue managements two main methods capacity control and dynamic pricing in the classical risk neutral setting then we provide an exhaustive review of the literature on risk averse and robust capacity control and dynamic pricing in doing so the relevant decision criteria are briefly introduced finally possible avenues for future research are outlined

bounds on elasticities with optimization frictions a synthesis of micro and macro evidence on labor supply how can price elasticities be identified when agents face optimization frictions such as adjustment costs or inattention i derive bounds on structural price elasticities that are a function of the observed effect of a price change on demand the size of the price change and the degree of frictions the degree of frictions is measured by the utility losses agents tolerate to deviate from the frictionless optimum the bounds imply that frictions affect intensive margin elasticities much more than extensive margin elasticities i apply these bounds to the literature on labor supply the utility costs of ignoring the tax changes used to identify intensive margin labor supply elasticities are typically less than 1 of earnings as a result small frictions can explain the differences between micro and macro elasticities extensive and intensive margin elasticities and other disparate findings pooling estimates from existing studies i estimate a hicksian labor supply elasticity of 0 33 on the intensive margin and 0 25 on the extensive margin after accounting for frictions

redistributive shocks and productivity shocks abstract a productivity innovation reduces labor share at impact making it countercyclical it subsequently produces a long lasting increase that peaks five years later at a level larger in absolute terms than the initial drop before slowly returning to average i e labor share overshoots we estimate a bivariate shock process to the production function that under competition in factor markets accounts for this overshooting we pose this process in an otherwise standard real business cycle economy and we find that the contribution of productivity innovations to the variance of hours is 1 of that in the standard rbc model

in quest of the slutsky diamond the slutsky equation can be constructed as a parallelogram a diamond the area of which is proportional to the elasticity of substitution this construction permits to show immediately that demand functions become concave on an interval if the elasticity of substitution increases sufficiently also the diamond sheds light on the fact that the production level increases with the elasticity of substitution as an application the author shows that the elasticity of substitution has a direct bearing not only on the rate of growth of an economy but also on the very existence of sustained growth copyright 1989 by american economic association

shocking stuff technology hours and factor substitution the response of hours to technology shocks is a key controversy in macroeconomics we show that differences between rbc and nk models hinge on highly restrictive views of technology we introduce ces production technologies and demonstrate that the response of hours depends on the factor augmenting nature of shocks and the capital labor substitution elasticity in both models we develop analytical expressions to establish the thresholds determining its sign this opens new margins for shock identification combining theory and var evidence we discuss how our models provide new robust restrictions for empirical work especially using the labor income share

robust price setting newsvendor model with interval market size and consumer willingness to pay we consider a price setting newsvendor problem with partial information the newsvendor does not know the price dependent probability distribution of demand but is able to estimate lower and upper limits of the market size and consumer willingness to pay the objective is to minimize the maximum loss in expected profit or minimax regret we derive closed form expressions for optimal quantity and price and identify managerial insights

workers machines and economic growth this paper models technology adoption as replacing workers by machines which perform the same job in the production process the paper shows that such modelling of technology adoption affects significantly the analysis of economic growth this model can explain large and persistent international differences in output levels and growth rates caused by small differences in underlying parameters

a minmax regret price control model for managing perishable products with uncertain parameters abstract conventional revenue management assumes that demand parameters used in the models are known the control policy derived based on such a premise however guarantees no optimality as the real parameters can significantly deviate from their estimates this article proposes a robust price control model for managing perishable products it attempts to find a policy that minimizes the worst case regret due to imperfect information distribution of each uncertain parameter is assumed arbitrary with only the lower and upper bound available we formulate the dynamic price control problem as a continuous time model under fairly mild conditions we derive the optimality condition for the control policy and develop a recursive procedure for the optimal solution our analysis shows that the proposed minmax regret price control model is equivalent to conventional rm models when demand parameters are deterministic we examine structural properties of the solution and managerial insights they imply numerical results show that the proposed robust model outperforms the conventional rm model when parameters are unknown in particular it significantly reduces the variation in revenues without sacrificing the average revenue

income inequality in the united states 1913 1998 this paper presents new homogeneous series on top shares of income and wages from 1913 to 1998 in the united states using individual tax returns data top income and wages shares display a u shaped pattern over the century our series suggest that the large shocks that capital owners experienced during the great depression and world war ii have had a permanent effect on top capital incomes we argue that steep progressive income and estate taxation may have prevented large fortunes from fully recovering from these shocks top wage shares were flat before world war ii dropped precipitously during the war and did not start to recover before the late 1960s but are now higher than before world war ii as a result the working rich have replaced the rentiers at the top of the income distribution

technical note robust newsvendor competition under asymmetric information we generalize analysis of competition among newsvendors to a setting in which competitors possess asymmetric information about future demand realizations and this information is limited to knowledge of the support of demand distribution in such a setting traditional expectation based optimization criteria are not adequate and therefore we focus on the alternative criterion used in the robust optimization literature the absolute regret minimization we show existence and derive closed form expressions for the robust optimization nash equilibrium solution for a game with an arbitrary number of players this solution allows us to gain insight into the nature of robust asymmetric newsvendor competition we show that the competitive solution in the presence of information asymmetry is an intuitive extension of the robust solution for the monopolistic newsvendor problem which allows us to distill the impact of both competition and information asymmetry in addition we show that contrary to the intuition a competing newsvendor does not necessarily benefit from having better information about its own demand distribution than its competitor has

indivisible labor and the business cycle abstract a growth model with shocks to technology is studied labor is indivisible so all variability in hours worked is due to fluctuations in the number employed we find that unlike previous equilibrium models of the business cycle this economy displays large fluctuations in hours worked and relatively small fluctuations in productivity this finding is independent of individuals willingness to substitute leisure across time this and other findings are the result of studying and comparing summary statistics describing this economy an economy with divisible labor and post war u s time series

revenue management with limited demand information in this paper we consider the classical multifare single resource leg problem in revenue management for the case where demand information is limited our approach employs a competitive analysis which guarantees a certain performance level under all possible demand scenarios the only information required about the demand for each fare class is lower and upper bounds we consider both competitive ratio and absolute regret performance criteria for both performance criteria we derive the best possible static policies which employ booking limits that remain constant throughout the booking horizon the optimal policies have the form of nested booking limits dynamic policies which employ booking limits that may be adjusted at any time based on the history of bookings are also obtained we provide extensive computational experiments and compare our methods to existing ones the results of the experiments demonstrate the effectiveness of these new robust methods

economic growth and the elasticity of substitution two theorems and some suggestions at the beginning of the twentieth century the work of the swedish economist knut wicksell 1901 marked an important advance in our understanding of the relationship between the structure of production functions and income distribution wicksell had asked the following question among many others suppose that the marginal productivities are equal to the remuneration rates of each factor what then should be the form of the corresponding production function he pointed out p 125 that the general integral of the partial differential equation implied by this relationship was of the form y lf kil which meant in turn that the product y was necessarily a homogeneous of degree one function of capital k and labor l as an example he gave a function where the shares of k and l in y were constant and wrote down the function which would be rediscovered decades later by charles w cobb and paul h douglas 1928 however it is only half a century later in robert m solow s nobel prize winning 1956 essay that implications between the structure of the production function and long run equilibrium or disequilibrium of the economy were drawn in his classic article a contribution to the theory of economic growth solow had considered three cases analytically other cases were also discussed geometrically using a phase diagram he had labeled the two first cases 1hlarrod domar and cobb douglas respectively and he referred to the third type of production function as offering a bit of variety it was y ak 2 l 2 2 a particular case of y akp lp 1p in those early days solow had not pointed out to the reader that his cases could have been numbered 0 1 and 2 following the elasticity of substitution of the corresponding production function it would be only five years later in 1961 that with his coauthors kenneth j arrow et al he would find the general form of the two factor constant elasticity of substitution ces production function by integrating the differential equation corresponding to the observed relationship between output per capita and the wage rate solow s third case was indeed highly interesting since it allowed the possibility of everincreasing income per head even without any technical progress indeed solow showed that due to the efficiency of the system entailed by the particular production function he had chosen there existed a threshold for the savings rates s to generate investment per head large enough for income per head to grow forever that threshold was s nla2 where n is the growth rate of the population it was then natural to ask whether one could express that threshold in terms of the elasticity of substitution a the value of that threshold was determined by de la grandville 1989 to be equal to s no3 or where a is k s coefficient in a normalized ces function equal to a in solow s third case where u 2 for any s and n values this relationship gives also the threshold value in implicit form by the solution of ao1 1 log 3q or ilog nls by totally differentiating the last relationship one could observe that the threshold for the elasticity of substitution to entail ever sustained growth was an in klump faculty of mathematics and economics university of ulm helmholtzstrasse 20 d 89081 ulm germany de la grandville department of economics university of geneva 102 boulevard carl vogt ch 1211 geneva 4 switzerland we gratefully acknowledge the comments of seminar participants at stanford university and at the universities of stuttgart hohenheim and munich where parts of the paper were presented also we would like to thank without implicating in any way robert solow for his insightful remarks and an anonymous referee for very helnfuil supgestions wicksell cobb and douglas would no doubt burst with pride if they knew that one of our first year students wrote in a paper of his of course we recognize here a kirk douglas production function

a non scale directed technical change model with endogenous labor share we extend a directed technical change dtc model without scale effects that allows labour share to vary over time by decomposing the labour share by sectors skilled and unskilled and in line w

state business cycles and their relationship to the national cycle structural and institutional determinants during business cycles state and regional incomes fluctuate in the same direction as national income in some states and regions income fluctuates more than the national average in other states and regions it fluctuates less although no general explanation for differences in business cycles across states exists an influential set of explanations focuses on differences in price flexibility gordon 2 3 has discussed the employment implications of sticky prices and made some international comparisons of unemployment rates his results imply that decreased price flexibility leads to increased variability of income and employment olson 6 7 and colander and olson 1 have suggested that differences in state unemployment rates arise from differences in price flexibility differences in price flexibility in turn originate in differences in structural characteristics and institutions 2 if a state s structure and institutions allow prices to be flexible most of the adjustment to changes in aggregate demand will be made by prices rather than output if a state s institutions tend to enforce price rigidity most of the adjustment to changes in aggregate demand will be made by output rather than prices the absence of acceptable state price indices prevents direct tests of the hypothesis that differences in price flexibility explain differences in income variability across states the inability to measure price flexibility by state turns out not to be a serious problem however because we are primarily interested in what determines the magnitude of fluctuations in state income institutional and structural differences across states lead to the differences in price flexibility that cause differences in the business cycle price flexibility is merely the transmission mechanism moreover it may not be the only transmission mechanism structural and institutional factors may affect state business cycles through a host of channels we will therefore focus directly on the relationship between structures and institutions and state business cycles by adopting such a procedure we may miss a particular transmission variable but we will be more likely to identify the total effect of structure and institutions on performance institutional and structural variables will be compared across states rather than regions an attractive alternative we used states rather than regions because states embody the political

job search and cyclical unemployment a model economy is described that integrates job search and signal extraction analysis equilibrium differs from search models without signal extraction in that even with a fixed real sector unemployment fluctuates stochastically it differs from standard signal extraction models because search introduces persistence in fact unemployment follows a second order difference equation with coefficient that are functions of current and lagged values of the stochastic shocks thus the model has the potential to mimic actual business cycle data despite the fact that the underlying shocks are independently and identically distributed policy implications are discussed

robust portfolio choice with learning in the framework of regret single period case in this paper we formulate a single period portfolio choice problem with parameter uncertainty in the framework of relative regret relative regret evaluates a portfolio by comparing its return to a family of benchmarks where the benchmarks are the wealths of fictitious investors who invest optimally given knowledge of the model parameters and is a natural objective when there is concern about parameter uncertainty or model ambiguity the optimal relative regret portfolio is the one that performs well in relation to all the benchmarks over the family of possible parameter values we analyze this problem using convex duality and show that it is equivalent to a bayesian problem where the lagrange multipliers play the role of the prior distribution and the learning model involves bayesian updating of these lagrange multipliers prior this bayesian problem is unusual in that the prior distribution is endogenously chosen by solving the dual optimization problem for the lagrange multipliers and the objective function involves the family of benchmarks from the relative regret problem these results show that regret is a natural means by which robust decision making and learning can be combined this paper was accepted by dimitris bertsimas optimization

equilibrium bias of technology this paper presents three sets of results about equilibrium bias of technology first i show that when the menu of technological possibilities only allows for factor augmenting technologies the increase in the supply of a factor induces technological change relatively biased toward that factor meaning that the induced technological change increases the relative marginal product of the factor becoming more abundant moreover this induced bias can be strong enough to make the relative marginal product of a factor increasing in response to an increase in its supply thus leading to an upward sloping relative demand curve i also show that these results about relative bias do not generalize when more general menus of technological possibilities are considered second i prove that under mild assumptions the increase in the supply of a factor induces technological change that is absolutely biased toward that factor meaning that it increases its marginal product at given factor proportions the third and most important result in the paper establishes the possibility of and conditions for strong absolute equilibrium bias whereby the price marginal product of a factor increases in response to an increase in its supply i prove that under some regularity conditions there will be strong absolute equilibrium bias if and only if the aggregate production function of the economy fails to be jointly concave in factors and technology this type of failure of joint concavity is possible in economies where equilibrium factor demands and technologies result from the decisions of different agents

dynamic pricing with a prior on market response we study a problem of dynamic pricing faced by a vendor with limited inventory uncertain about demand and aiming to maximize expected discounted revenue over an infinite time horizon the vendor learns from purchase data so his strategy must take into account the impact of price on both revenue and future observations we focus on a model in which customers arrive according to a poisson process of uncertain rate each with an independent identically distributed reservation price upon arrival a customer purchases a unit of inventory if and only if his reservation price equals or exceeds the vendor s prevailing price we propose a simple heuristic approach to pricing in this context which we refer to as decay balancing computational results demonstrate that decay balancing offers significant revenue gains over recently studied certainty equivalent and greedy heuristics we also establish that changes in inventory and uncertainty in the arrival rate bear appropriate directional impacts on decay balancing prices in contrast to these alternatives and we derive worst case bounds on performance loss we extend the three aforementioned heuristics to address a model involving multiple customer segments and stores and provide experimental results demonstrating similar relative merits in this context

factor complementarity and labour market dynamics abstract we propose and estimate a dynamic stochastic general equilibrium model featuring search and matching frictions deep habits and a ces production function the model successfully replicates the cyclical properties of labour market variables in the us economy for three main reasons first two of the endogenous mechanisms of the model factor complementarity and unemployment benefits play a key role for explaining the amplification in unemployment and vacancies second deep habits have a smaller but significant role as an endogenous mechanism third capital augmenting productivity investment specific and matching efficiency innovations explain large part of the variation in labour market variables

a microfoundation for normalized ces production functions with factor augmenting technical change based on a tractable endogeneous technology choice framework we provide a microfoundation for aggregate normalized constant elasticity of substitution ces production functions with non neutral factor augmenting technical change in this framework firms are allowed to choose unit productivities of capital and labor optimally from a technology menu constructed under the assumption that unit factor productivities ufps are independently weibull distributed the weibull distribution itself is also microfounded here based on extreme value theory it is found to be an accurate and robust approximation of the true ufp distribution if technologies consist of a large number of complementary components

revenue management under a general discrete choice model of consumer behavior customer choice behavior such as buy up and buy down is an important phenomenon in a wide range of revenue management contexts yet most revenue management methodologies ignore this phenomenon or at best approximate it in a heuristic way in this paper we provide an exact and quite general analysis of this problem specifically we analyze a single leg reserve management problem in which the buyers choice behavior is modeled explicitly the choice model is very general simply specifying the probability of purchase for each fare product as a function of the set of fare products offered the control problem is to decide which subset of fare products to offer at each point in time we show that the optimal policy for this problem has a quite simple form namely it consists of identifying an ordered family of efficient subsets s 1 s m and at each point in time opening one of these sets s k where the optimal index k is increasing in the remaining capacity x and decreasing in the remaining time that is the more capacity or less time available the further the optimal set is along this sequence we also show that the optimal policy is a nested allocation policy if and only if the sequence of efficient sets is nested that is s 1 s 2 s m moreover we give a characterization of when nesting by fare order is optimal we also develop an estimation procedure for this setting based on the expectation maximization em method that jointly estimates arrival rates and choice model parameters when no purchase outcomes are unobservable numerical results are given to illustrate both the model and estimation procedure

robust monopoly pricing we consider a robust version of the classic problem of optimal monopoly pricing with incomplete information in the robust version the seller faces model uncertainty and only knows that the true demand distribution is in the neighborhood of a given model distribution we characterize the pricing policies under two distinct decision criteria with multiple priors i maximin utility and ii minimax regret the equilibrium price under either criterion is lower then in the absence of uncertainty the concern for robustness leads the seller to concede a larger information rent to all buyers with values below the optimal price without uncertainty

maximizing revenues of perishable assets with a risk factor this article presents a risk sensitive pricing model to maximize sales revenue of perishable commodities with fixed capacity and finite sales horizon the model assumes a pair of predetermined prices and the poisson demand process whose intensity is a decreasing function of price when optimizing the expected revenue management takes business risk into account by adding a penalty or premium to the objective function we solve the continuous time model with the exact solution in closed form we further analyze the influence of risk attitude on optimal policies

innis lecture explorations in medium run macroeconomics medium run macroeconomics refers to aggregate economic phenomena that manifest over periods of 10 to 25 years this area of research has emerged over the last decade as a new and distinct field of enquiry in this paper i overview a set of personal attempts aimed at understanding certain medium run phenomena such as changes in the wage structure changes in the world distribution of income per capita and changes in growth patterns across oecd countries the goal of the paper is to extract general lessons from these experiences in particular i will discuss why models of endogenous technological choice may be a good starting point for studying medium run phenomena jel classification e00 o00 explorations du monde macroeconomique a moyen terme la macroeconomie a moyen terme s attache aux phenomenes economiques agreges qui se manifestent sur des periodes de 10 a 25 ans ce champ de recherche a emerge au cours de la derniere decennie en tant que chantier nouveau et distinct dans ce texte je fais le tour d un ensemble de tentatives personnelles pour comprendre certains phenomenes de moyen terme comme les changements dans les structures de salaires les changements dans la distribution des revenus per capita dans le monde et les changements dans les patterns de croissance a travers les pays de l ocde l objectif de ce memoire est d extraire certaines lecons generales de ces experiences en particulier on discute des raisons pour lesquelles les modeles de choix technologiques endogenes constituent un bon point de depart pour l etude des phenomenes de moyen terme

explaining differences in state growth catching up versus olson in this paper we have tested various explanations for differences in rates of economic growth across states we found no evidence consistent with olson s hypothesis that differences in state age a proxy for the strength of special interest groups can explain differences in state growth furthermore our results indicate that a regression containing only initial income explains most of the variation in the growth of state income in sum a good part of the more rapid growth of southern and other fast growing states is simply a convergence to the national average this convergence is an expected result of basic economic theory given free trade in goods and factors our results are however not necessarily a rejection of the olson hypothesis it may well be that the hypothesis should only be applied to comparisons between nation states not to comparisons between political divisions of the same nation state the institutional and political similarities of the american states may swamp the differences and make the olson hypothesis inapplicable the tendencies cited by olson may indeed be present in the american economy but their differential effect is much too small to explain any of the variation in economic performance across states

appropriate technology and balanced growth we provide a general theoretical characterization of how firms technology choice on a technology frontier determines the long run elasticity of substitution between capital and labour we show that the shape of the frontier determines factor shares and the elasticity of substitution between capital and labour if there are adjustment costs to technology choice the short and long run elasticities differ with the long run always higher if the technology frontier is log linear the production function becomes cobb douglas in the long run but consistent with empirical evidence short run dynamics are characterized by gross complementarity the approach is easily implementable and yields a powerful way to introduce ces type production functions in macroeconomic models we provide an illustration within an estimated dynamic general equilibrium model and show that the use of our production technology provides a good match for the short and medium run behaviour of the u s labour share

robust multiarmed bandit problems the multiarmed bandit problem is a popular framework for studying the exploration versus exploitation trade off recent applications include dynamic assortment design internet advertising dynamic pricing and the control of queues the standard mathematical formulation for a bandit problem makes the strong assumption that the decision maker has a full characterization of the joint distribution of the rewards and that arms under this distribution are independent these assumptions are not satisfied in many applications and the out of sample performance of policies that optimize a misspecified model can be poor motivated by these concerns we formulate a robust bandit problem in which a decision maker accounts for distrust in the nominal model by solving a worst case problem against an adversary nature who has the ability to alter the underlying reward distribution and does so to minimize the decision maker s expected total profit structural properties of the optimal worst case policy are charac

why economic reforms fail in the soviet system a property rights based approach jan winiecki why do economic reforms fail in soviet type systems despite the obvious interest of ruling groups in improving the performance of their ailing economies the author applies a property rights based analysis stressing modes of rent maximization by ruling groups as a crucial explanatory variable party apparatchiks and economic bureaucrats particularly benefit from persistent interference in the economic sphere and consequently are most interested in maintaining the status quo the author surveys the impact of these motivations on the content of economic reforms outlines the strategies of counterreformers and predicts the future of reforms in soviet type economies 1 introduction in analyzing the disequilibrium characteristics of contemporary western economies mancur olson 1982 1984a 1984b agrees with the neoclassical macroeconomists in finding that given the tendencies of markets to clear and given the rational expectations of economic agents any disequilibrium indicates that all mutually advantageous transactions have not been consummated having made this point however he asks what can make agents ignore the potential gains from unconsummated transactions and turns his attention toward the structure of incentives and thus of institutions and policies olson insists and rightly so that a satisfactory static and dynamic macroeconomic theory has to explain who among key actors has the incentive to generate economic growth and equilibrate the economy and who does not furthermore no government even an authoritarian one has an incentive to generate serious recessions or disequilibria olson 1984a 637 writes that even in dictatorial systems the dictator has an incentive to make the economy of the country he controls work better since this will generate more tax receipts he can use as he pleases and usually also reduce dissent olson s arguments about incentives institutions and disequilibria offer an ideal basis for an inquiry into why reforms fail in soviet type economies stes in olson s theories of incentives the old roman principle of criminal law cui prodest who gained is applied to modem economies and the results suggest that contrary to widespread opinion it is not necessarily the small but powerful group of high and highest leaders that stands to gain most in terms of power and privilege from the preservation of the existing order a powerful political elite could satisfy its desires for both power and privilege through an alternative undemocratic system one which involves authoritarian don ts rather than totalitarian do s in that perspective the inefficient system of economic control typical in stes involving centrally planned production goals and input rationing would not be a condition sine qua non of an authoritarian solution since totalitarian command and control systems persist however one must seek groups other than the powerful and privileged few which have incentives to resist reforms and keep the economy inefficient the following sections identify the membership and motives of groups having strong incentives to keep the stes inefficient and prevent successful i e market oriented reforms we show how those groups operate and analyze their effects on the economic performance of their countries first the incentives for these groups to prevent decentralized management in the state sector are spelled out then their incentives to prevent the expansion of the more efficient private sector are outlined third having identified who benefits from the status quo and why the paper discusses when and how market oriented reforms are aborted limited or reversed by those who stand to gain from the reforms failure the last two sections consider the prospects of current attempts at economic reform in three specific countries poland the ussr and china and the prospects for economic reform in stes more generally

regret aversion and opportunity dependence this paper provides an axiomatic model of decision making under uncertainty in which the decision maker is driven by anticipated ex post regrets our model allows both regret aversion and likelihood judgement over states to coexist also we characterize two special cases minimax regret with multiple priors that generalizes savage s minimax regret and a smooth model of regret aversion

the missing link monetary policy and the labor share the textbook new keynesian nk model implies that the labor share is pro cyclical conditional on a monetary policy shock we present evidence that a monetary policy tightening robustly increased the labor share and decreased real wages and labor productivity during the great moderation period in the us the euro area the uk australia and canada we show that this is inconsistent not only with the basic nk model but with a wide variety of nk models commonly used for monetary policy analysis and where the direct link between the labor share and the markup can be broken down

revenue management without forecasting or optimization an adaptive algorithm for determining airline seat protection levels we investigate a simple adaptive approach to optimizing seat protection levels in airline revenue management systems the approach uses only historical observations of the relative frequencies of certain seat filling events to guide direct adjustments of the seat protection levels in accordance with the optimality conditions of brumelle and mcgill 1993 stochastic approximation theory is used to prove the convergence of this adaptive algorithm to the optimal protection levels in a simulation study we compare the revenue performance of this adaptive approach to a more traditional method that combines a censored forecasting method with a common seat allocation heuristic emsr b

a taxonomy and research overview of perishable asset revenue management yield management overbooking and pricing this paper proposes the term perishable asset revenue management to denote the field that combines the areas of yield management overbooking and pricing for perishable assets after summarizing the characteristics common to problems in this field the paper discusses the objectives and constraints faced by decision makers then it offers a comprehensive taxonomy with 14 different elements and reviews the research that has been done related to each element finally it suggests some important areas of future research that can help bridge the gap between theory and application

take the money and run political turnover rent seeking and economic growth abstract we find a negative and significant relationship between gubernatorial turnover and u s state economic growth although our finding of an inverse relationship between growth and political instability may seem to contradict olson s 1982a famous hypothesis regarding the growth retarding nature of political stability such constitutional political changes were not primarily what olson had in mind we argue that enhanced political turnover is associated with more rent seeking since payoffs to focusing on special interest redistributive policies vs general growth enhancing ones are greater for less durable regimes therefore we interpret our evidence as supportive of olson s broader argument concerning the negative affect of rent seeking behavior on growth

long run implications of investment specific technological change an attempt is made to disentangle its effects from the more traditional hicksneutral form of technological progress the balanced growth path for the model is characterized and calibrated to u s national income and product account nipa data the quantitative analysis suggests that investment specific technological change accounts for the major part of growth jel e13 030 041 047

what determines the elasticity of substitution between capital and labor a literature review this paper provides the first comprehensive review of the empirical and theoretical literature on the determinants of the elasticity of substitution between capital and labor our focus is on the two input constant elasticity of substitution ces production function we start by presenting four concise observations that summarize the empirical literature on the estimation of motivated by these observations the main part of this survey then focuses on potential determinants of capital labor substitution we first review several approaches to the microfoundation of production functions where the elasticity of substitution eos is treated as a purely technological parameter second we outline the construction of an aggregate elasticity of substitution aes in a multi sectoral framework and investigate its dependence on underlying intra and inter sectoral substitution third we discuss the influence of the institutional framework on the extent of factor substitution overall this survey highlights that the effective elasticity of substitution ees which is typically estimated in empirical studies is generally not an immutable deep parameter but depends on a multitude of technological non technological and institutional determinants based on these insights the final section identifies a number of potential empirical and theoretical avenues for future research

airline seat allocation with multiple nested fare classes this paper addresses the problem of determining optimal booking policies for multiple fare classes that share the same seating pool on one leg of an airline flight when seats are booked in a nested fashion and when lower fare classes book before higher ones we show that a fixed limit booking policy that maximizes expected revenue can be characterized by a simple set of conditions on the subdifferential of the expected revenue function these conditions are appropriate for either the discrete or continuous demand cases these conditions are further simplified to a set of conditions that relate the probability distributions of demand for the various fare classes to their respective fares the latter conditions are guaranteed to have a solution when the joint probability distribution of demand is continuous characterization of the problem as a series of monotone optimal stopping problems proves optimality of the fixed limit policy over all admissible policies a comparison is made of the optimal solutions

a nonparametric approach to multiproduct pricing developed by general motors gm the auto choice advisor website http www autochoiceadvisor com recommends vehicles to consumers based on their requirements and budget constraints through the website gm has access to large quantities of data that reflect consumer preferences motivated by the availability of such data we formulate a nonparametric approach to multiproduct pricing we consider a class of models of consumer purchasing behavior each of which relates observed data on a consumers requirements and budget constraint to subsequent purchasing tendencies to price products we aim at optimizing prices with respect to a sample of consumer data we offer a bound on the sample size required for the resulting prices to be near optimal with respect to the true distribution of consumers the bound exhibits a dependence of o n log n on the number n of products being priced showing thatin terms of sample complexitythe approach is scalable to large numbers of products with regards to computational complexity we establish that computing optimal prices with respect to a sample of consumer data is np complete in the strong sense however when prices are constrained by a price ladderan ordering of prices defined prior to price determinationthe problem becomes one of maximizing a supermodular function with real valued variables it is not yet known whether this problem is np hard we provide a heuristic for our price ladder constrained problem together with encouraging computational results finally we apply our approach to a data set from the auto choice advisor website our analysis provides insights into the current pricing policy at gm and suggests enhancements that may lead to a more effective pricing strategy

factor substitution and factor augmenting technical progress in the united states a normalized supply side system approach abstract using a normalized ces function with factor augmenting technical progress we estimate a supply side system of the u s economy from 1953 to 1998 avoiding potential estimation biases that

structural properties of markov modulated revenue management problems abstract the admission decision is one of the fundamental categories of demand management decisions in the dynamic model of the single resource capacity control problem the distribution of demand does not explicitly depend on external conditions however in reality demand may depend on the current external environment which represents the prevailing economic financial social or other factors that affect customer behavior we formulate a markov decision process mdp to maximize expected revenues over a finite horizon that explicitly models the current environment we derive some structural results of the optimal admission policy including the existence of an environment dependent thresholds and a comparison of threshold levels in different environments we also present some computational results which illustrate these structural properties finally we extend some of the results to a related dynamic pricing formulation

the dynamic effects of neutral and investment specific technology shocks the neoclassical growth model is used to identify the short run effects of neutral technology shocks which affect the production of all goods homogeneously and investment specific shocks which affect only investment goods the real equipment price crucial for identifying the investment shocks experiences an abrupt increase in its average rate of decline in 1982 so the analysis is based on a split sample on the basis of the preferred specification the two technology shocks account for 73 percent of hours and 44 percent of output s business cycle variation before 1982 and 38 percent and 80 percent afterward the shocks also account for more than 40 percent of hours and 58 percent of output s forecast errors over a three to eight year horizon in both samples the majority of these effects are driven by the investment shocks

the productivity slowdown the oil shocks and the real cycle f ive facts stand out about economic performance in the united states since world war ii the first is that for most of the postwar period the u s has had a slower rate of economic growth than the other major developed democracies except great britain and much lower rates of growth than germany japan and italy the gap between the growth of per capita income of the united states and comparable countries has however tended to diminish over time and the united states has lately grown at about the same rate as most other developed countries the second outstanding fact is that the united states has fallen far behind in many mass production industries in which it used to lead the world whereas it is ahead of other nations in many new and especially high technology industries in automobiles steel tires household appliances and earth moving and farm equipment for example u s production has fallen dramatically in relation to output in most comparable countries and the country has become a net importer of most such products by contrast in newer industries such as computers jet aircraft sophisticated weaponry and high technology in general the united states is often dominant both as producer and exporter the third outstanding fact is that most of the older heartland of american industry roughly the area north and east of an arc drawn from baltimore to st louis to milwaukee has declined dramatically in comparison with the south and the west this change in regional fortunes has been due in large part to migration motivated by differences in economic prospects from the declining to the advancing

beyond keynesianism and monetarism though there is consensus among economists about microeconomic theory neither the keynesian nor the monetarist theory of macroeconomics has attracted a consensus presumably because neither is compelling enough to persuade the skeptical a new approach to the subject that combines insights from each of the familiar schools with considerations that both schools have overlooked is accordingly offered here this argument accepts the evidence that involuntary unemployment and depressions sometimes occur and thus rejects the finding of the new classical or equilibrium macroeconomics that markets always clear and that all individuals and firms are in equilibrium it also rejects the keynesian assumption of wages or prices arbitrarily fixed at disequilibrium levels and insists that any adequate theory must show what interests are served by the existence of involuntary unemployment the theory offered here shows that an institutional or organizational arrangement common in all societies which have experienced widespread unemployment and deep recessions entails that many firms and individuals will be in disequilibrium this disequilibrium becomes more severe when there is unexpected deflation or disinflation the disequilibrium is of precisely the type commonplace in recessions and entails involuntary unemployment the theory also shows how groups of individuals and firms can gain from practices that entail involuntary unemployment and underutilization of resources for others