on the efficiency of law a public choice perspective economists have not yet developed a comprehensive theoretical framework incorporating transaction cost economics within a public choice perspective for predicting when there will be an efficiency problem with the law transaction cost reasoning and the rent seeking insight have not been applied systematically in a dynamic institutional context to evaluate when the law will be used to increase or not minimize problems of bounded rationality and opportunism this paper takes a first step at identifying and remedying this deficiency the paper first provides a critical review of relevant theoretical contributions made by becker 1983 1985 posner 1977 priest 1977 rubin 1977 1982 williamson 1975 1985 and others we then show how analysis of the efficiency of law can be synthesized into a broader whole by incorporating transaction cost economics more fully into existing understanding of rentseeking in the political realm thus within the public choice paradigm this paper develops a deeper transaction cost analysis of the efficiency of law building on prior research by the authors crew and rowley 1988a 1988b twight 1983 1988 the paper identifies variables that position legal rules on a spectrum that ranges from those that are predominantly transaction cost

a spatial model of legislative voting with perceptual error this paper presents a unidimensional spatial model of voting in which members of congress vote based on an imprecise perception of roll call alternatives the model is applied to the senate roll call votes of 1977 to estimate the ideal points of the senators and to examine the role of a liberal conservative dimension in describing votes on economic issues relative to social issues in light of the spatial model the paper argues that standard models of roll call voting are not based on a theory of choice and hence that it is difficult to interpret their results alternatives to standard models based on the spatial model are developed and are used to analyze the role of ideology in deciding a specific economic issue coal strip mining

competition in political and economic markets do anomalies play an important role in explaining economic and political choices are political decisions more prone to anomalies irrationality and inefficiency than economic decisions in their integration of results derived from experimental psychology and applied political economy frey and eichenberger 1990 argue that social scientists ought to answer these questions in the affirmative after examining a large body of choice data frey and eichenberger conclude that individuals deviate from the axioms of rational choice in their view the resultant anomalies in individual behavior are unaffected by the aggregation which occurs in the economic marketplace they conclude that political decision making systems correct no larger a proportion of these anomalies than are corrected by the economic market in many institutional settings outlined in their paper decision making systems can be expected to magnify individuals deviations from rational behavior system wide irrational behavior will then produce less frequent trading and a less efficient allocation of resources in this note we examine two components of frey and eichenberger s argument first we reconsider their evidence for irrational behavior in light of a larger body of experimental data which includes choices made in market settings second we argue that competition in political markets will tend to eliminate aggregate anomalies just as it does in economic markets experimental economists often generate data which distinguish between choices individuals indicate in unstructured environments and transactions individuals consummate in markets initial statements regarding choices are often inconsistent with subsequent trading behavior these data indicate that the economist s maximization paradigm based on tenets of rational choice is

an milp approximation for ordering perishable products with non stationary demand and service level constraints abstract we study the practical production planning problem of a food producer facing a non stationary erratic demand for a perishable product with a fixed life time in meeting the uncertain demand the food producer uses a fifo issuing policy the food producer aims at meeting a certain service level at lowest cost every production run a setup cost is incurred moreover the producer has to deal with unit production cost unit holding cost and unit cost of waste the production plan for a finite time horizon specifies in which periods to produce and how much we formulate this single item single echelon production planning problem as a stochastic programming model with a chance constraint we show that an approximate solution can be provided by an milp model the generated plan simultaneously specifies the periods to produce and the corresponding order up to levels the order up to level for each period is corrected for the expected waste by explicitly considering for every period the expected age distribution of the products in stock the model assumes zero lead time and backlogging of shortages the viability of the approach is illustrated by numerical experiments simulation shows that in 96 4 of the periods the service level requirements are met with an error tolerance of 1

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

a general equilibrium model of congressional voting in this paper we specify a model in which congressmen constituents and campaign contributors simultaneously decide on behavior constituents and contributors desire to influence the voting behavior of congressmen congressmen on the other hand want to be elected and vote accordingly we empirically test this model using roll call voting on eight bills dealing with economic regulation and find support for the model our results indicate that part of the voting behavior of congressmen may be explained by noneconomic factors we also find that unions and businesses as campaign contributors are sometimes influential unions are more often influential than is business ideological factors are also important in explaining voting

capture and ideology in the economic theory of politics the economic theory of regulation long ago put public interest theories of politics to rest these theories have correctly been viewed as normative wishings rather than explanations of real world phenomena they have been replaced by models of political behavior that are consistent with the rest of microeconomics anthony downs 1957 james buchanan and gordon tullock 1965 george stigler 1971 sam peltzman 1976 recently however debate has arisen over whether some version of a public interest theory of regulation will have to be readmitted to our thinking about actions and results in the political arena what is at issue is the empirical importance of the altruistic publicly interested goals of rational actors in determining legislative and regulatory outcomes james kau and paul rubin 1979 kalt 1981 peltzman 1982 this study assesses the nature and significance of publicly interested objectives in a particular instance of economic policymaking u s senate voting on coal strip mining regulations the existence of such objectives is of course no contradiction of the economic view of human behavior kenneth arrow 1972 gary becker 1974 and may well be rooted in genetic biological history becker 1976 jack hirshleifer 1978 generally however individuals altruistic publicly interested goals have been given little attention this reflects the judgment that such goals are so empirically unimportant as to allow the use of occam s razor in positive models or well founded apprehensions that these goals are unusually difficult to identify measure and analyze notwithstanding the latter problem we find that approaches which confine themselves to a view of political actors as narrowly egocentric maximizers explain and predict legislative outcomes poorly the tracking and dissecting of the determinants of voting on coal strip mining policy suggest that the economic theory of politics has been prematurely closed to a broader conception of political behavior

an explanation for why senators from the same state vote differently so frequently abstract this paper explains why rational well informed voters elect politicians with divergent platforms given well defined constituencies and the costliness of any individual politician creating transfers across all interest groups we show that different politicians from the same district can successfully represent vastly different constituencies and still have each politician producing the support maximizing level of transfers our explanation focuses on how obtaining wealth transfers reduces successful constituencies returns to obtaining additional transfers the evidence strongly rejects alternative explanations based upon the median voter and polarized policy preference approaches

the duality of a dynamic model of equilibrium and an optimal growth model the heterogeneous capital goods case the equivalence between optimal growth solutions and solutions of decentralized models of intertemporal allocation is explored in a one consumer heterogeneous capital goods framework the decentralized economy follows a perfect foresight path the main result is that the decentralized economy will impose on itself a transversality condition this yields the interpretation of equilibrium prices as prices consistent with a certainty version of the efficient markets hypothesis the results rest on the recent contribution by benveniste and scheinkman providing sufficient conditions for infinite horizon concave programs to exhibit capital value transversality as a necessary condition for optimality

a new approach to the spatial theory of electoral competition in his unidimensional model of electoral competition downs argues that voters use party ideology as an informational short cut for forecasting the policies that a party will pursue if elected parties are perceived by voters as points on an ideological axis in the davis hinich multidimensional model on the other hand the axes are real issues and the principal actors are politicians who are modeled as points in the multi issue space this paper reformulates spatial voting theory in terms of a model that connects what we call predictive dimensions with political issues that are salient during a given election campaign this model is both a synthesis and an extension of the downs and davis hinich spatial models we obtain a median voter result for one predictive dimension that is similar to the downs result but with important differences we also obtain results showing the electoral advantage of incumbency and the tendency for incremental change when there is a great deal of heterogeneity in voter perceptions about the candidates

the dynamics of agglomeration externalities along the life cycle of industries neffke f henning m boschma r lundquist k j and olander l o the dynamics of agglomeration externalities along the life cycle of industries regional studies this paper investigates the changing roles of agglomeration externalities along the industry life cycle it is argued that industries have different agglomeration needs in different stages of their life cycles because their mode of competition innovation intensity and learning opportunities change over time for twelve swedish manufacturing industries it is determined for each year between 1974 and 2004 whether the industry is in a young intermediate or mature stage whereas marshall arrow romer mar externalities steadily increase with the maturity of industries the effects of local diversity jacobs externalities are positive for young industries but decline and even become negative for more mature industries neffke f henning m boschma r lundquist k j et olander l o la dynamique des effets externes d agglomeration tout

towards an understanding of the role of standard setters in standard setting abstract we investigate the effect of standard setters in standard setting we examine how certain professional and political characteristics of fasb members and sec commissioners predict the accounting reliability and relevance of proposed standards notably we find fasb members with backgrounds in financial services are more likely to propose standards that decrease reliability and increase relevance partly due to their tendency to propose fair value methods we find opposite results for fasb members affiliated with the democratic party although only when excluding financial services background as an independent variable jackknife procedures show that results are robust to omitting any individual standard setter

incomplete information and ideological explanations of platform divergence one of the paradoxes of formal spatial voting models is the robustness of the theoretical result that candidates will converge toward centrists positions and the empirical observation of persistent policy divergence of candidates a solution is that candidates are ideological have policy preferences when candidates have policy preferences and incomplete information about voter preferences then platform divergence is theoretically predicted experimental tests of the ideological model are presented it is shown that platform divergence is significant when candidates are ideological and have incomplete information about voter preferences however candidate positions are more convergent on average than the theory predicts suggesting that subjects value winning independently of the expected payment

industry specific firm growth and agglomeration duschl m scholl t brenner t luxen d and raschke f industry specific firm growth and agglomeration regional studies this paper analyses the industry specific relationship between industrial clustering and firm growth micro geographically defined agglomeration measures based on travel time distances and a flexible log logistic decay function framework are used to study the spatial impacts of related economic and knowledge generating activities in 23 industries it is found that firms growth prospects tend to be generally hampered by the agglomeration of own industry employment whereas the impact of proximate scientific activities systematically depends on the kind and age of industry furthermore the optimal specifications of decay function that measures agglomeration effects considerably vary between both the industrsssies and the variables

blood platelet inventory management with protection levels abstract we consider a discrete time inventory system for a perishable product where demand exists for product of different ages an example of such a product is blood platelets in addition to the classical costs for inventory holding outdating and shortage our model includes substitution mismatch costs incurred when a demand for a certain aged item is satisfied by a different aged item we propose a simple inventory replenishment and allocation heuristic to minimize the expected total cost over an infinite time horizon in our heuristic inventory of the newest items is replenished in fixed quantities and the newest items are protected for future use by limiting some substitutions when making allocation decisions according to a critical level policy we model our problem as a markov decision process mdp derive the costs of our heuristic policy and computationally compare this policy to extant near optimal policies in the literature our extensive computational study shows that our policy leads to superior performance compared to existing heuristics in the literature particularly when supplies are limited

blood inventory management an overview of theory and practice blood inventory management has attracted significant interest from the operations research profession during the last 15 years a number of methodological contributions have been made in the areas of inventory theory and combinatoric optimization that can be of use to other products or systems these contributions include the development of exact and approximate ordering and issuing policies for an inventory system the analysis of lifo or multi product systems and various forms of distribution scheduling in addition many of these results have been implemented either as decision rules for efficient blood management in a hospital or as decision support systems for hierarchical planning in a regional blood center in this paper we attempt a review of the recent operations research contributions to blood inventory management theory and practice whereas many problems have been solved others remain open and new ones keep being created with advances in medical technology and practices our approach is not to present an exhaustive review of all the literature in the field but rather to address several important issues from a unified perspective of theory and practice and point out new areas for further research

the interactive effects of human capital and quality of life on economic growth abstractto bridge the gap in the quality of life qol and economic growth literature and understand the reinforcing effects of qol and human capital on economic development we examine the interactive effects of these two factors on wage growth from 2000 to 2007 at the county level across the united states first a rosen roback model is employed to estimate implicit values of amenities including climate clean air and other natural attributes which are used to generate qol indices second qol human capital represented by the share of college graduates and their interaction serve as key variables in the wage growth model an instrumental variable approach and location fixed effects are used to address endogeneity of human capital and control for location specific unobservable characteristics results suggest that human capital and qol significantly contribute to economic growth and the growth effects are even larger in nonmetropolitan counties importantly we find that the effect of human capital on

do spinoff dynamics or agglomeration externalities drive industry clustering a reappraisal of steven klepper s work steven klepper s theory of industry clustering based on organizational reproduction and inheritance through spinoffs challenged the marshallian view on industry clustering this article provides an assessment of klepper s theoretical and empirical work on industry clustering we explore how new his spinoff theory on industry clustering was and we investigate the impact of klepper s theory on the economic geography community klepper s work has inspired especially recent literature on regional branching that argues that new industries grow out of and recombine capabilities from local related industries finally the article discusses what questions on industry location are still left open or in need of more evidence in the context of klepper s theory less

mergers and acquisitions in blood banking systems a supply chain network approach blood banking systems in the united states over the past decade have been faced with a volatile demand for blood specifically a decrease in demand for red blood cells for a variety of reasons this change in the blood supply chain landscape accompanied by an increasing emphasis on cost efficiency is a driver of mergers acquisitions between blood banks in this paper we first present supply chain network optimization pre and post merger models the models handle perishability of the life saving product of blood include both operational and discarding costs of waste capture the uncertainty associated with the demand points as well as the expected total blood supply shortage cost and the total discarding cost at demand points they also incorporate capacities on the links their solution yields the optimal path and link flows plus the frequencies of activities associated with blood collection shipment testing and processing storage and distribution and incurred total costs we provide a cost efficiency synergy measure associated with a merger or acquisition in the blood banking industry as well as measures capturing the expected supply shortage and surplus the methodological framework and its applicability are then illustrated via a large scale blood supply chain network example inspired by a pending merger in the real world in both status quo and disaster scenarios

ideological conviction and persuasion in the rent seeking society abstract the paper develops a model of rent seeking in a democratic political context where voting as well as rent seeking matters in this context the paper demonstrates that voter ideology is a constraint on the rent seeking game as well as a possible avenue of rent seeking in a setting where there are both rent seeking and ideological interest groups rent seekers can free ride on the efforts of ideologues which tends to reduce rent seeking effort in a setting where complementary economic and ideological interest groups coordinate their efforts both rent seeking and ideological conflict tend to increase

scale externalities in korea this paper estimates the nature and magnitude of scale externalities in a developing country korea in the period 1983 1993 this is a period of rapid industry deconcentration from seoul to other metro areas providing a context where externalities are measured when local scale magnitudes are changing dramatically the data allow us to examine the emerging degree of national industrial concentration in different industries as related to their scale externality magnitudes we also examine whether individual industries agglomerate in cities which have a comparative advantage for that industry

the new economics of organization over the last ten years or so an important new approach to the study of organizations has emerged within economics it is perhaps best characterized by three elements a contractual perspective on organizational relationships a theoretical focus on hierarchical control and formal analysis via principal agent models this paper provides political scientists with an overview of the new economics of organization and explores its implications for the study of public bureaucracy so far positive political theory has not contributed much to our understanding of public bureaucracy in part this is due to the unsympathetic treatment that rational modeling and most other modes of quantitative analysis have long received from students of public administration the other side of the coin however is that positive theorists have not made much of an effort to develop theories of bureaucracy their concerns have centered around two basic mechanisms of social choice voting and markets and they have devoted little systematic attention to a third mechanism that is clearly important for understanding how societies and other aggregates make collective decisions this third and relatively unexplored mechanism is hierarchy movement toward a positive theory of hierarchies would fill a serious gap in the social choice literature while at the same time making a theoretical contribution that strikes to the essence of public bureaucracy indeed of all organizations in fact significant steps toward a positive theory of hierarchies have very recently been taken but by economists not political scientists in small numbers of course economists made contributions to the study of public bureaucracy some time ago with the pioneering works of downs 1967 tullock 1965 and niskanen 1971 but this new wave of theoretical work is different it is already a large complex body of literature that is the focus of innovation and excitement among a growing number of economists and it reflects an unusual degree of theoretical coherence and cumulative effort work in this tradition tends to receive orientation from a distinctive economic approach to the analysis of organizations an approach perhaps best characterized by three elements a contractual perspective on organizational relationships a focus on hierarchical control and formal analysis via principal agent models this approach has emerged from recent attempts to move beyond the neoclassical theory of the firm which assumes away all organizational considerations to a theory of economic organizations that can explain why firms corporations and other enterprises behave as they do propo

why not greater catch up by chinese firms the impact of ipr corporate governance and technology intensity on late comer strategies abstract how can late comer firms lcfs in developing economies manage their development of technological capability and within it their ip strategically in order to become fully competitive internationally under what conditions external and internal are they likely to succeed this paper develops a theoretical framework for understanding lcfs technology strategy and predicting its outcome then applies it to the cases of three chinese firms in sectors at different levels of technology intensity this yields insights as to its limitations and further development these help explain mainland china s very limited catch up in high technology sectors and to a lesser extent in medium high technology we show how our findings can be reconciled with the much greater success of korean firms some 20 years earlier if the effect of corporate governance differences is recognised

related variety unrelated variety and technological breakthroughs an analysis of us state level patenting castaldi c frenken k and los b related variety unrelated variety and technological breakthroughs an analysis of us state level patenting regional studies this paper investigates how variety affects the innovation output of a region borrowing arguments from theories of recombinant innovation it is expected that related variety will enhance innovation as related technologies are more easily recombined into a new technology however it is also expected that unrelated variety enhances technological breakthroughs since radical innovation often stems from connecting previously unrelated technologies opening up whole new functionalities and applications using patent data for us states in the period 1977 99 and associated citation data evidence is found for both hypotheses this study thus sheds a new and critical light on the related variety hypothesis in economic geography

modeling an inventory routing problem for perishable products with environmental considerations and demand uncertainty the transition to sustainable food supply chain management has brought new key logistical aims such as reducing food waste and environmental impacts of operations in the supply chain besides the traditional cost minimization objective traditional assumptions of constant distribution costs between nodes unlimited product shelf life and deterministic demand used in the inventory routing problem irp literature restrict the usage of the proposed models in current food logistics systems from this point of view our interest in this study is to enhance the traditional models for the irp to make them more useful for the decision makers in food logistics management therefore we present a multi period irp model that includes truck load dependent and thus route dependent distribution costs for a comprehensive evaluation of co2 emission and fuel consumption perishability and a service level constraint for meeting uncertain demand a case study on the fresh tomato distribution operations of a supermarket chain shows the applicability of the model to a real life problem several variations of the model each differing with respect to the considered aspects are employed to present the benefits of including perishability and explicit fuel consumption concerns in the model the results suggest that the proposed integrated model can achieve significant savings in total cost while satisfying the service level requirements and thus offers better support to decision makers

inverted u relationship between r d intensity and survival evidence on scale and complementarity effects in uk data existing evidence on the relationship between rd ii rd and iii creative destruction as proxied by median r d intensity in the industry and the premium on business lending have negative effects on firm survival other findings concerning age size productivity relative growth pavitt technology classes and the macroeconomic environment are in line with the existing literature the results are strongly or moderately robust to different samples stepwise estimations and controls for frailty and left truncation

universalism in experimental committees most rational choice theories of committee decision making predict a process of competitive coalition formation leading to a minimum winning coalition committee experiments reported to date tend to support these theories however both theories and committee experiments are contradicted by the evidence of real world legislatures making distributive decisions these decisions are characterized by coalitions of the whole providing virtually all members with a share of distributive benefits the results in this article help to resolve this contradiction by showing that if the committee experimental design includes a universalistic alternative which provides a high level of expected benefits for committee members it will be selected competitive coalition formation occurs in experimental settings which do not include such an alternative the results call into question the generality of ordinalist theories of competitive coalition formation

the ideological component of senate voting different principles or different principals evidence exists on both sides of the question of whether or not legislator specific ideologically driven shirking of constituent interest occurs in this paper we use a well known model of such shirking by senators as our point of departure and add measures of inter state constituent interests the role of campaign contributions and hence the importance of whether or not senators are up for reelection we find some evidence that the model provides a stronger explanation for senators up for reelection than for those who are not and that campaign contributions help determine voting decisions by these legislators finally accounting for inter state constituent interests shirking is not a significant variable in the voting decisions of senators facing reelection thus it appears that the reelection interests of some senators have been mistaken for ideologically driven shirking

technology intensity and agglomeration economies abstract this article investigates the relationship between industry technology intensity and the impacts of agglomeration economies on industrial growth many recent studies suggest the actual economic impacts of different forms of agglomeration economies depend on industrial characteristics such as technology intensity but systematic empirical evidence is still lacking to fill this gap we analyze employment data covering all 3 digit naics industries of u s counties the results confirm that technology intensive industries are more likely to benefit from jacobs spillovers as measured by related variety while sectors with low technology intensities can better benefit from mar spillovers as measured by regional specialization

spatial externalities relatedness and sector employment growth in great britain bishop p and gripaios p spatial externalities relatedness and sector employment growth in great britain regional studies this paper examines the impact of externalities on employment growth in sub regions of great britain by estimating ordinary least squares ols and maximum likelihood spatial models at the two digit level for 23 sectors issues arising from relatedness sector differences competition cross boundary spillovers and spatial autocorrelation are explicitly addressed results indicate that specialization has a generally negative impact on growth whilst the impact of diversity is heterogeneous across sectors and strong local competition has a typically positive impact the results question the merits of policies primarily aimed at promoting regional specialization and suggest that diversity local competition and sector heterogeneity are important policy issues bishop p et gripaios p les effets externes geographiques la connectivite et la croissance de l emploi sectoriel en grand

revisiting marshall s agglomeration economies technological relatedness and the evolution of the sheffield metals cluster potter a and watts h d revisiting marshall s agglomeration economies technological relatedness and the evolution of the sheffield metals cluster regional studies according to alfred marshall firms receive increasing returns from a trinity of agglomeration economies a local pool of skilled labour local supplier linkages and local knowledge spillovers this article re examines the mechanisms underlying marshall s agglomeration economies in the sheffield metals cluster wherein marshall discovered them despite the cluster s decline empirical evidence is found that the mechanisms underlying marshallian agglomeration economies continue to occur within the surviving metals industry however upon closer examination marshallian agglomeration economies have evolved to become more prevalent amongst plants that use related metals technology the results highlight the importance of technological relatedness to cluster survival

the influence on congress by the thrift industry abstract the investigation of the influential role of the thrift industry on congress as demonstrated by voting behavior on regulatory policy changes in the eighties is the focus of this study specifically we search for the degree to which the inadequately capitalized component of the thrift industry has captured the house of representatives we examine the influence on congress by the thrift industry using the votes by the house of representatives associated with three different legislative acts the garn st germain act the competitive equality banking act and the financial institutions reform recovery and enforcement act addressing the thrift crisis using a multi chotomous voting model we identify traditional public choice variables that could influence the probability of voting for legislation to capture the variation of the thrifts interests we consider a series of financial variables motivated by the thrift literature of failure prediction models these variables allow us to investigate the influences from the health of the congressional district s thrifts their asset composition characteristics and their reliance on regulatory forbearance

self interest altruism and health risk reduction an economic analysis of voting behavior while classical economic theory suggests that the demand for private goods is motivated by economic self interest a growing body of literature suggests that the demand for public goods is driven both by self interest and by altruistic motives the political arena has been a major testing ground for this hypothesis recently a number of studies have tried to empirically isolate and determine the importance of economic versus ideological factors in explaining political choices by representatives kau and rubin 1979 peltzman 1984 kalt and zupan 1984 while congressional voting records have provided a rich source of data for empirical analysis a consensus opinion on the importance of self interest versus altruism has not been reached and remains controversial altruistic motivations have also been

on measuring partisanship in roll call voting the u s house of representatives 1877 1999 on measuring partisanship in roll call voting the u s house of representatives 1877 1999 we propose a method of assessing party influence based on a spatial model our method provides the first test of whether observed values of the widely used rice index of party dissimilarity are consistent with a partyless null model it also avoids problems that beset previous estimators substantively we find evidence of party influence in all but one congress since 1877 moreover our indicator of party pressure is systematically higher for the sorts of roll calls that party theorists believe are more pressured procedural organizational and label defining votes our results refute the widespread notion that parties in the house have typically had negligible influence on roll call voting behavior they also document important changes in party influence associated with the packing of the rules committee in 1961 and the procedural reforms of 1973

coalitions in congressional voting scholars of congress generally agree on four points concerning roll call votes first roll call votes are important to members of congress who care about reelection public policies or both second members have neither sufficient resources nor incentives to acquire process and interpret information about the content and consequences of hundreds of roll call votes considered on the floor each year 1 third insufficient resources and incentives induce members to apply simple decision rules on most votes fourth a voting model should conform to the choices members make under uncertainty 2 the scholars however differ in their specification of the simple rules members adopt familiar specifications include voting decisions rooted in two or three party alignments one or more policy dimensions self interest or ideology and cue taking to varying degrees most command an intuitive appeal and empirical support clearly it is important to evaluate each model based on its a refutable implications or b performance relative to the competing models to test a unidimensional voting model in which members vote based on an imprecise perception of the issues involved 4 this paper adopts the first approach it seeks to refute a pair of comparative static implications of the model two reasons account for the adoption of approach a and not b first to the extent feasible a comparison of the unidimensional model with the competing voting models appears in poole and rosenthal 1985a 1985b second the likelihood ration test considered to be statistically unambiguous requires that competing models generate a nested set of hypotheses see amemiya 1981 unfortunately models of roll call voting with substantially different origins 5 seldom meet this requirement

non binding linked issues referenda analysis and an application non binding referenda petitions are an instrument of direct democracy that allows citizens to signal preferences to politicians outside the electoral cycle this paper provides a simple theoretical and empirical analysis of a particular form of non binding referenda so called linked issues petitions it analyzes the ability of issue linkage to increase participation levels above those of single issue petitions and applies the analytical insights to a controversial referendum held in austria in 2002 that linked issues of transboundary nuclear risk and eastern enlargement of the european union

technology entrepreneurship and path dependence industrial clustering in silicon valley and route 128 silicon valley and route 128 have been the centers of innovation and commercialization for the electronics computer and data communications industries in the postwar period however since the 1960s silicon valley has grown more rapidly and from approximately 1985 through 1995 route 128 experienced retarded growth their success had diverged dramatically in the last decade the most common explanations for this divergence are differing cultures interfirm relations or and internal organizational style organization this paper builds upon path dependent and dominant design explanations of technical and industrial change arguing that the technological trajectories of the industries underlying the two regions were different and this led to their differential destinies to explain the dynamics of the two regions and analytical separation is made between the economy of the existing firms and a separate economy of institutions that evolved to nurture new firm formation copyright 1999 by oxford university press

separating economic from political influences on government decisions abstract the public interest theory is a poor predictor of government decisions relative to interest group theories but a sophisticated public interest theory is a more serious alternative to the former testing the sophisticated theory s predictions is problematic however when public interest is coincident with an interest group s interests a four step method is developed that disentangles public interest and interest group interests by separating economic from political incentives applying the method to the national forest service decisions about wilderness designations indicates whether interest groups were successful in influencing allocation decisions and whether allocation decisions were in the public interest

constructing regional advantage platform policies based on related variety and differentiated knowledge bases asheim b t boschma r and cooke p constructing regional advantage platform policies based on related variety and differentiated knowledge bases regional studies this paper presents a regional innovation policy model based on the idea of constructing regional advantage this policy model brings together concepts like related variety knowledge bases and policy platforms related variety attaches importance to knowledge spillovers across complementary sectors the paper categorizes knowledge into analytical science based synthetic engineering based and symbolic arts based in nature with different requirements of virtual and real proximity mixes the implications of this are traced for evolving platform policies that facilitate economic development within and between regions in action lines appropriate to incorporate the basic principles behind related variety and differentiated knowledge bases asheim b t boschma r and cooke p

do voters affect or elect policies evidence from the u s house there are two fundamentally different views of the role of elections in policy formation in one view voters can affect candidates policy choices competition for votes induces politicians to move toward the center in this view elections have the effect of bringing about some degree of policy compromise in the alternative view voters merely elect policies politicians cannot make credible promises to moderate their policies and elections are merely a means to decide which one of two opposing policy views will be implemented we assess which of these contrasting perspectives is more empirically relevant for the u s house focusing on elections decided by a narrow margin allows us to generate quasi experimental estimates of the impact of a randomized change in electoral strength on subsequent representatives roll call voting records we find that voters merely elect policies the degree of electoral strength has no effect on a legislator s voting behavior for example a large exogenous increase in electoral strength for the democratic party in a district does not result in shifting both parties nominees to the left politicians inability to credibly commit to a compromise appears to dominate any competition induced convergence in policy

campaign war chests as a barrier to entry in congressional races i introduction issues surrounding the nature and degree of competition in political races have been examined extensively in both the economic and political science literature with most attention focused on the interplay between incumbent and challenger expenditures and electoral success this study extends our understanding of political competition by investigating the impact of an incumbent s war chest on a challenger s decision to mount a campaign 1 for this purpose a war chest is defined as a pool of unencumbered funds accumulated prior to the start of a campaign for elective office 2 sorauf 1988 182 has observed that early receipts even without early spending discourage competition in the primary and attractive challengers in the general election jacobson 1985 26 has argued the most effective strategy for keeping a seat in congress is to avoid serious opposition contemporary critics and reformers of campaign financing practices use such words as frighten intimidate and overpower to describe the role of an incumbent s war chest 3 despite this kind of attention little is actually known about the degree to which war chests diminish entry or reduce the quality of a challenge we present three alternative mechanisms to explain how an incumbent s war chest might deter entry each is based upon a war chest serving as a credible commitment to spend heavily if challenged specifically war chests may either represent excess capacity in financing a campaign or serve as a signal of non observable incumbent characteristics that define a formidable opponent aside from determining whether an incumbent is challenged a war chest might also affect the quality of the challenger for example potential candidates with prior political experience may be unwilling to risk their political capital on a long shot proposition to test for these effects on entry into house races a trichotomous logit model is estimated the choices are uncontested race contested by an ordinary challenger and contested by an experienced challenger although the empirical model is not sufficiently rich to fully distinguish among competing mechanisms the regression results are robust incumbent war chests negatively affect the likelihood of a contested race and the quality of the challenger ii war chests as a barrier to entry becker 1958 106 in comparing economic and political competition observed i n an ideal political democracy competition is free in the sense that no appreciable costs or artificial barriers prevent an individual from running for office in the theory of the firm entry occurs when the expected postentry stream of profits minus the cost of entry is positive analogously an individual will enter a political race when the expected gain from holding office is positive expected gain as defined by baron 1989 is a function of campaign costs the probability of winning and the personal valuation placed by the candidate on the office the first two determinants are partly endogenous depending upon the strategic interplay of the candidates the third aside from its direct effects indirectly affects the first two for example persons hungry for office may be committed to expending greater effort and funds on their campaigns thus increasing their probability of winning similarly as lott has emphasized nontransferable brand name capital would be another factor creating a commitment to aggressively pursue office thereby affecting campaign costs and the probability of winning 4 that some challengers are deterred however need not imply the existence of a political market failure in a contestability sense the lack of a viable challenger on the ballot does not imply a lack of competition good representation will discourage entry similarly the fact that some incumbents will aggressively seek re election frightening away potential challengers is not a sign that competition is lacking

a two stage stochastic programming model for inventory management in the blood supply chain managing inventories in the blood supply chain is a challenging task mainly due to the uncertain nature of the demand for blood units the perishable nature of the blood and a strong subjective bias towards criteria other than cost minimisation in this paper we propose a two stage stochastic programming model for defining optimal periodic review policies for red blood cells inventory management that focus on minimising operational costs as well as blood shortage and wastage due to outdating taking into account perishability and demand uncertainty the adoption of this framework allows the consideration of more general stochastic processes to model the demand uncertainty than approaches currently available in literature moreover this framework renders a model that can be solved efficiently by general purpose off the shelf optimisation software to illustrate the potential benefits of adopting the proposed model to support the definition of optimal blood inventory control policies a case study is presented considering realistic data representing the daily demand for blood which was generated using the average and standard deviation of the demand for eight types of blood results suggest meaningful insights concerning practices that could lead to improvement in the blood supply chain performance in particular we observed that it would be possible to revise the current inventory control policies by reducing current target levels to diminish wastage and total cost without compromising the service level finally the consideration of blood substitutions showed further improvement in the performance of the blood inventory management system

earning through learning in legislatures this inquiry applies gary becker s theoretical notions of general and specific training to the experiential learning that occurs within political institutions in particular the u s congress in the process we isolate economic facets of these legislative experiences that influence the rental value of human capital derived from congressional training we identify four factors that structure legislators post elective wages pre congressional salary year of entry tenure and variables closely related to general training in congress specifically assignment to powerful legislative committees acquisition of broad skill packages investment in expanding skill set proficiencies and to a lesser extent life cycle driven declines in such investments