credit financing in economic ordering policies of deteriorating items this paper presents the economic ordering policies of deteriorating items in the presence of trade credit using a discounted cash flows dcf approach a dcf approach permits a proper recognition of the financial implication of the opportunity cost and out of pocket costs in inventory analysis it also permits an explicit recognition of the exact timing of cash flows associated with an inventory system a comprehensive sensitivity analysis has also been done

what money canʼt buy efficient mechanism design with costly signals i study the ex ante efficient allocation of a set of quality heterogeneous objects to a number of heterogeneous risk neutral agents agents have independent private values which represent the maximum cost they are willing to sustain to obtain an object of unitary quality the designer faces a trade off between allocative efficiency and cost of screening because the cost sustained is wasted the optimal mechanism ranks agents based on their marginal contribution to social surplus and distributes objects to higher ranked agents the ranking is independent of the scarcity of objects or the extent of their heterogeneity if the hazard rates of the distributions of values are increasing agents are ranked according to their expected values if hazard rates are decreasing and agents are symmetric the objects are allocated to the agents that sustain the highest costs in general optimal mechanisms combine both pooling and screening of values

how not to sell nuclear weapons we consider situations where a sale affects the ensuing interaction between potential buyers these situations are modeled by assuming that an agent who does not acquire the object for sale incurs an identity dependent externality we construct a revenue maximizing auction for the seller we observe that 1 outside options and participation constraints are endogenous 2 the seller extracts surplus also from agents who do not obtain the auctioned object 3 the seller is better off by not selling at all while obtaining some payments if externalities are much larger than valuations

sources procedures and microeconomic effects of innovation fabio arcangeli paul david frank engelman christopher freeman massimo moggi richard nelson luigi orsenigo nathan rosenberg michele salvati g n von tunzelman two anonymous referees and the participants at the meeting of the committee on distribution growth and technical progress of the italian national research council cnr rome november 16 1985 have helped with various redraftings a particularly grateful acknowledgment is for the insightful and patient help of moses abramovitz this work has been undertaken at the science policy research unit spru university of sussex as part of the research program of the designated research centre sponsored by the economic and social research council esrc earlier support to the research that led to this paper by the italian national research council cnr is also gratefully acknowledged the statistical research has been undertaken with the assistance of stephano brioschi ilaria fornari and giovannu prennushi

demand and innovation schmookler re examined schmookler s demand pull hypothesis implying that innovation is a function of market demand has been widely accepted re reading schmookler s invention and economic growth we discover a statistical inadequacy re estimating his cross section results in a different way we find somewhat lower coefficients moreover the direction of causality appears to be far from obvious an independent cross sectional test of the schmookler hypothesis in the netherlands based on r d instead of patent data shows similar results the relationship between indicators of demand and innovation turns out to be generally weaker but in most cases still significant and the results suggest that there is a simultaneous relationship between demand and innovation the latter may be explained by the concept of the innovation multiplier which has implications for macro economic modelling 1 re reading schmookler schmookler s 13 finding of a strong relationship between investment in capital goods users industries and patent applications by capital goods producing sectors has been generally accepted by economists as evidence that patenting is a function of effective demand demand pull hypothesis quite a number of case studies have followed schmookier s seminal work but there have been

incentives and uncertainty an empirical analysis of the impact of demand on innovation we study the impact of demand on innovation by focusing on a sample of small and medium sized enterprises in several industries and european countries we analyse how demand stimulates innovation by providing economic incentives and reducing uncertainty considering the size of the market as a proxy for the presence of demand we find support for the idea that the presence of incentives stimulates innovation this is particularly true for process innovation in considering interaction with customers as a way to reduce uncertainty we find that firms that see customers as the most important sources of information for both innovation ideas and completion tend to introduce product innovations firm size r d expenditure and sectoral effects also matter

modelling r d expenditure data with zero observations two equation model this article attempts to analyse the determinants of firms research and development r d expenditures in korea by considering the business environment after the economic crisis in 1997 in addition to take into account zero r d expenditure this article employed a two equation model unlike models used in other studies this method incorporates a two level decision structure the participation decision and the decision on the amount to spend once the issue of participation has been decided according to the estimation results while the proposition that larger firms are more active in r d is true the proposition that firms that possess market power are more active in r d is not true for korea technical cooperation among korean firms seems to be less active than in other countries in addition the results indicate that foreign investment stimulates the firms r d expenditure furthermore a number of factors were found to play a role in promoting firms r d activities the external conditions of the f

information disclosure in auctions with downstream competition when bidders valuations are derived from a downstream market in which they may compete the allocation to the firms with the lowest costs can differ from the allocation that maximizes the ex post valuations of the bidders i consider the problem of auctioning two goods to bidders whose valuations for a good flexibly depend on their and their rival s costs as well as the identity of the rival i show that revealing the identities of winners through a sequential auction procedure leads to allocations in which bidders tend to have higher ex post valuations but also higher costs when compared to a simultaneous auction

when do auctions ensure the welfare maximizing allocation of scarce inputs we determine when an unfettered auction will ensure the welfare maximizing allocation of a scarce input that enhances product quality and may reduce production costs a supplier values the input for this use value and for its foreclosure value because once the input is acquired it is unavailable to rivals an unfettered auction often ensures the welfare maximizing allocation of an input increment however it can fail to do so when the input would increase relatively rapidly the competitive position of a rival with a moderate competitive disadvantage bidder handicapping that ensures auctions generate welfare maximizing input allocations differ from standard handicapping policies

auctions and information acquisition sealed bid or dynamic formats the value of an asset is generally not known a priori and it requires costly investments to be discovered in such contexts with endogenous information acquisition which selling procedure generates more revenues we show that dynamic formats such as ascending price or multistage auctions perform better than their static counterpart this is because dynamic formats allow bidders to observe the number of competitors left throughout the selling procedure thus even if competition appears strong ex ante it may turn out to be weak along the dynamic format thereby making the option to acquire information valuable this very possibility also induces the bidders to stay longer in the auction just to learn about the state of competition both effects boost revenues and our analysis provides a rationale for using dynamic formats rather than sealed bid ones

entry by takeover auctions vs bilateral negotiations firms often enter new markets by taking over an incumbent we analyze a potential entrant s choice of target under two exogenously given takeover mechanisms i auctions where other incumbents can bid for the target against the entrant and ii bilateral negotiations between the entrant and the target the entrant s choice of target depends on the mechanism and it may not maximize its ex post profit nor consumer welfare in an auction the entrant pays a higher price to take over a target with higher synergies because these impose stronger negative externalities on incumbents and increase their willingness to pay for preventing entry auctions increase the price obtained by the target but reduce welfare compared to negotiations because they may discourage the entrant from acquiring a target with higher synergies

sectoral patterns of technical change towards a taxonomy and a theory abstract the purpose of the paper is to describe and explain sectoral patterns of technical change as revealed by data on about 2000 significant innovations in britain since 1945 most technological knowledge turns out not to be information that is generally applicable and easily reproducible but specific to firms and applications cumulative in development and varied amongst sectors in source and direction innovating firms principally in electronics and chemicals are relatively big and they develop innovations over a wide range of specific product groups within their principal sector but relatively few outside firms principally in mechanical and instrument engineering are relatively small and specialised and they exist in symbiosis with large firms in scale intensive sectors like metal manufacture and vehicles who make a significant contribution to their own process technology in textile firms on the other hand most process innovations come from suppliers these characteristics and variations can be classified in a three part taxonomy based on firms 1 supplier dominated 2 production intensive 3 science based they can be explained by sources of technology requirements of users and possibilities for appropriation this explanation has implications for our understanding of the sources and directions of technical change firms diversification behaviour the dynamic relationship between technology and industrial structure and the formation of technological skills and advantages at the level of the firm the region and the country

an eoq model with noninstantaneous receipt and exponentially deteriorating items under two level trade credit abstract this paper considers the impact of the trade credit policy on the classical economic production quantity epq model for an item subject to exponential decays essentially this study focuses on an exponentially deteriorating item under the conditions of the retailer receiving the supplier trade credit and providing the customer trade credit simultaneously so as to minimize the average total cost a theorem is developed to determine the optimal replenishment policies the main contribution to literature is the inclusion of the latter type of payment delay finally through numerical examples sensitive analysis shows the influence of key model parameters

numerical analysis of asymmetric first price auctions abstract we propose numerical algorithms for solving first price auction problems where bidders draw independent valuations from heterogeneous distributions the heterogeneity analyzed in this work is what might naturally emerge when subsets of distributionally homogeneous bidders collude bid functions and expected revenues are calculated for two special cases extensions to more general asymmetric first price auctions are discussed journal of economic literature classification numbers d44 c63 c72 d82

optimal inventory policy with noninstantaneous receipt under trade credit abstract in the last two decades the models for inventory replenishment policies under trade credit have been widely studied by several researchers however the extant papers only consider the effects of permissible delay in payments in the inventory systems in some situations the supplier also may offer a cash discount to encourage retailer to pay for his purchases quickly on the other hand an inventory model with instantaneous receipt is not a common feature in actual practice for generality this study develops an inventory model with noninstantaneous receipt under trade credit in which the supplier provides not only a permissible delay but also a cash discount to the retailer we then characterize the optimal solution and provide an easy to use criterion to find the optimal order strategies finally several numerical examples are presented to illustrate the theoretical results

firm size small business presence and sales of innovative products a micro econometric analysis in our generalized tobit analysis we identify a number of variables which have an impact on a firm s innovation output among others we find that larger firms generally have a higher probability of selling some innovative products although this probability increases less than proportionately with firm size given that a firm has some sales of innovative products the share of such products in a firm s total sales tends to be higher in smaller firms moreover a strong small business presence in a sector seems to enhance imitative innovation but has no influence on true innovations whereas market concentration has no influence on innovation output in whatever definition we also find evidence of regional knowledge spill overs furthermore our results are consistent with schmookler s hypothesis that the growth of demand enhances innovation the outcomes about the impact of r d collaboration and technology transfer on innovation remain ambiguous

non cooperative entry deterrence in license auctions dynamic versus sealed bid we examine the impact of potential entry on incumbent bidding behavior in license auctions in both dynamic and sealed bid formats unlike sealed bid auctions dynamic auctions reveal information about the identities of potential winners and allow bidders to revise their bids this helps incumbents to coordinate their entry deterrence efforts if entry is sufficiently costly for each incumbent only the dynamic auction has an equilibrium where entry is deterred for sure numerical calculations suggest that regardless of how costly entry is for each incumbent sealed bid auctions can generate a higher probability of entry as well as a more efficient allocation

an economic perspective on auctions the recent spectrum auctions in europe have shown that serious problems can wise in auctions where multiple complementary objects are being sold such as blocks of radio spectrum that will subsequently be used by the wining bidders to compete against each other in downstream markets other important instances of such situations include take off and landing slots at airports and rights for electricity and gas transmission t i first review some of the theory describing multi object auctions i i next outline the importance of strategic effects arising in auctions that are followed by competition between the bidders and the tension arising between various goals such as efficiency and revenue maximization although more flexible auction formats can have virtues particularly in taking into account complementarities they can also be manipulated by bidders to build market power to the detriment of consumers we next apply these insights to the recent european umts licence auctions finally we draw the main conclusions and policy implications

market versus corporate structure in plant level innovation performance this paper examines the effect which market and corporate structure have on the extent of innovation for a sample of circa 300 manufacturing plants located in scotland innovation is defined as the introduction of a commercially significant new product at the establishment level the theoretical model of geroski 1990 is extended to incorporate plant level variables such as size multiplant operation the presence of r d facilities and external indigenous ownership a distinction is made between the direct and indirect effects of these variables negative binomial estimations indicate that corporate structure influences are more important in determining the number of innovations than market structure and barrier to entry variables plant size foreign ownership and the presence of r d are all positively associated with innovation direct effects greatly outweigh indirect effects tobit estimations on the number of innovations per employee support the findings of acs and audretsch 1988 that smaller enterprises are more innovation intensive than larger enterprises at least up to a limit of around 1200 employees the positive effect of r d arises principally from increasing the probability of a plant becoming an innovator rather than from making a plant more innovation intensive by contrast the importance of size lies principally in encouraging further innovations among plants which are already innovators but less than proportionately with the increase in employment size

auctioning countermeasures in the wto we offer a first formal analysis of auctioning retaliation rights within the wto we show that the auctions exhibit externalities among bidders and we characterize equilibrium bidder behavior under alternative auction formats if the violating country is prevented from bidding to retire the right of retaliation against it then the possibility of auction failure arises whereby no bids are made despite positive valuation by bidders if the violating country is instead permitted to bid then auction failure is precluded and indeed the right of retaliation is always retired we evaluate these different auction formats from normative revenue compliance efficiency standpoints

the optimal inventory policies under permissible delay in payments depending on the ordering quantity abstract this paper deals with the problem of determining the economic order quantity under conditions of permissible delay in payments the delay in payments depends on the quantity ordered when the order quantity is less than the quantity at which the delay in payments is permitted the payment for the item must be made immediately otherwise the fixed trade credit period is permitted the minimization of the total variable cost per unit of time is taken as the objective function an algorithm to determine the economic order quantity is developed the results obtained in this paper generalize some already published results

is demand pulled innovation equally important in different groups of firms previous empirical literature has tested the demand pull hypothesis and found that innovation may be driven by output using a balanced panel of 216 italian manufacturing firms 1995 2000 and checking for the path dependent nature of r d we find a role of sales in inducing r d however the demand pull effect plays a varying role for different sub samples of firms exporting firms liquidity constrained firms not subsidised firms and those not heading a group seem to be sensitive to sales in deciding r d these results have been obtained using a least squares dummy variable corrected estimator a recent panel data technique suitable for small samples

invention and innovation in the chemical industry demand pull or discovery push abstract this paper describes a study of the determinants of the rate direction and scale of inventive and innovative activity in the chemical industry over the period 1830 1980 statistical data are interpreted in the light of case study material in three major sectors dyestuffs plastics and pharmaceuticals theories of technical change and economic growth particularly those of schmookler and schmpeter are examined in relation to this material on the chemical industry the findings suggest that the importance of demand pull and discovery push factors and the validity of schmookler s and schumpeter s theories vary over an industry s life cycle

on optimal payment time for a retailer under permitted delay of payment by the wholesaler abstract jamal et al 2000 optimal payment time for a retailer under permitted delay of payment by the wholesaler international journal of production economics 66 59 66 study a wholesaler retailer supply chain where the retailer is given a permissible credit period to pay back the dues without paying any interest to the wholesaler the problem is modeled as a cost minimization problem with two decision variables the payment time p of the retailer and the length of the inventory cycle t while the model represents in general an interesting problem we show in this note that there are a number of nontrivial flaws contained in the development of their model and therefore the solution they derived is not correct we give the correct model and derive the corresponding optimal solution

determinants of environmental innovation new evidence from german panel data sources abstract in most cases empirical analyses of environmental innovations based on firm level data relied on surveys for one point in time these surveys allow for the inclusion of many explanatory variables such as different policy instruments or the influence of pressure groups but it is not possible to address the dynamic character of environmental innovations this paper uses two german panel databases the establishment panel of the institute for employment research iab and the mannheim innovation panel mip of the centre for european economic research zew to explore the determinants of environmental innovations the econometric estimations show that the improvement of the technological capabilities knowledge capital by r d triggers environmental innovations environmental regulation environmental management tools and general organizational changes also encourage environmental innovation a result that has also been postulated by the famous porter hypothesis

the optimal retailer s ordering policies for deteriorating items with limited storage capacity under trade credit financing abstract under permissible delay in payments all previously published models implicitly assumed that the supplier would offer the retailer a delay period but the retailer would not offer the trade credit period to his her customer huang 2003 journal of the operational research society 54 1011 1015 developed a retailer s replenishment model to reflect the real life situations by assuming that the retailer also adopts the trade credit policy to stimulate his her customer demand in huang s model it is assumed that the goods are not perishable and the storage capacity is unlimited based upon the above argument we propose a two warehouse inventory model for deteriorating items under permissible delay in payments three theorems are developed to determine the optimal cycle time and numerical examples are given to illustrate these theorems finally the results in this paper generalize the results presented by huang 2003 journal of the operational research society 54 1011 1015

recent results in measuring innovation output abstract the fraunhofer institut fur systemtechnik und innovationsforschung isi is at present engaged in evaluating a number of technology policy programs designed to promote research development and innovation in small and medium sized firms these studies try to determine the extent to which these programmes have an impact upon the innovative activities of firms in this connection it was also attempted to measure the innovation output the level of innovation of a firm is innovation ouput the level of innovation of a firm is procedure involves a number of problems self assessment of firms in view of insufficient market transparency distortion due to self portraits reflecting the firms own interests we tried to mitigate such distortions by two approaches firstly firms were asked for their technologically new products the term new being applied a to the firm and b to the areas of product application as a result of this two tier procedure firms supplied rather realistic answers secondly supplementary questions were asked about sales figures the competitive technological situation nationally and internationally expenditure on r d patents stages of innovation aims of innovation etc the paper presents the results obtained to date on the innovation output of firms within the framework of an evaluation of the largest programme at present devoted to promoting r d and innovation in small and medium sized firms the results are based on a representative sample of approximately 4 500 small and medium sized firms up to 1 00 employees with r d activities in the federal republic of germany

auctions with quantity externalities and endogenous supply abstract this paper studies the design of license auctions when the number of licenses allocated in the auction determines structure of the post auction market i first show that a sequence of conditional reserve prices that specify minimum acceptable bid at each supply level can be used to determine supply endogenously then i construct a static auction called multi dimensional uniform price auction and a dynamic auction called walrasian clock auction that allow the auctioneer to condition reserve price on supply and allow bidders to condition bids on supply i show that both proposed auctions can implement the efficient market structure that maximizes total surplus in the post auction market in a dominant strategy equilibrium i next characterize the optimal auction and show that the two proposed auctions can yield the optimal revenue under a sequence of optimal reserve prices

optimal pricing and ordering policy under permissible delay in payments abstract many researchers have assumed that the selling price is the same as the purchase cost and developed various eoq models for a retailer when the supplier offers a permissible delay in payments in this paper we complement the shortcoming of their models by considering the difference between the selling price and the purchase cost we then develop an algorithm for a retailer to determine its optimal price and lot size simultaneously when the supplier offers a permissible delay in payments our theoretical result contradicts to their conclusion that the economic replenishment interval and order quantity generally increases marginally under the permissible delay in payments

firms motivations for cooperative r d an empirical analysis of spanish firms abstract the aim of this paper is to analyze the motives that have caused industrial firms to cooperate in r d there are many theoretical works devoted to the theme but few empirical studies have been carried out with large samples to analyze the factors which determine why firms cooperate in r d we first review the reasons offered by the literature to explain technological cooperation with this allowing us to determine the conceptual framework and to propose some hypotheses we test these hypotheses with a sample of 1652 spanish firms that have carried out r d activities the results obtained suggest that firms motivations for cooperative r d are the complexity of technology and the fact that innovation is costly and uncertain we find that in order to undertake cooperative r d it is necessary to have certain internal capacities in this area with our results being supported by the theory of absorptive capacity however and by contrast with the results presented in other works questions related to market access and search for opportunities do not appear to exert an influence over cooperative r d besides the large sized firms resort more to cooperation and the reasons for cooperative r d differ as between large and small sized firms

an optimal auction with identity dependent externalities we analyze the problem of a seller of multiple identical units of a good who faces a set of buyers with unit demands private information and identity dependent externalities we derive the seller s optimal mechanism and characterize its main properties we show that the probability that a buyer obtains a unit is an increasing function of the externalities he generates and enjoys also the seller s allocation of the units of the good need not be ex post efficient as an illustration we apply the model to the problem faced by a developer of a shopping mall who wants to allocate and price its retail space among anchor and non anchor stores we show that a commonly used sequential mechanism is not optimal unless externalities are large enough

standard auctions with identity dependent externalities i analyze equilibrium bidding behavior in the open ascending bid auction with identity dependent externalities with reciprocal externalities the allocation is determined by bidders consumption values alone with large nonreciprocal externalities the open auction generates higher expected revenue compared to standard sealed bid auctions the progress of the open auction reveals more information about the identity of the potential winner allowing active bidders greater opportunity to avoid incurring payoff reducing externalities the associated option value to staying active up until a relatively high price translates into higher expected revenue multiple bidders may sequentially quit at the same price and relative to sealed bid auctions bidders experience less ex post regret

efficiency in auctions with crossholdings we study the impact of crossholdings on the efficiency of the standard auction formats the ascending auction is not equivalent to the second price auction in a class of examples the ascending auction is the only efficient standard auction format

joint price and lot size determination under conditions of permissible delay in payments and quantity discounts for freight cost abstract this paper deals with the problem of determining the retailer s optimal price and lot size simultaneously under conditions of permissible delay in payments it is assumed that the ordering cost consists of a fixed set up cost and a freight cost where the freight cost has a quantity discount offered due to the economies of scale the constant price elasticity demand function is adopted which is a decreasing function of retail price investigation of the properties of an optimal solution allows us to develop an algorithm whose validity is illustrated through an example problem

license auctions when winning bids are financed through debt we study an auction where two licenses to operate on a new market are sold and winning bidders finance their bids on the debt market higher bids imply higher debts which affects product market competition when debt induces firms to compete more aggressively retail prices are lower than in a model without debt as are auction revenues when debt induces firms to compete less aggressively retail prices are higher than in a model without debt and the effect on auction revenues is ambiguous net firm profits are always higher than in a model without debt due to endogenous credit rationing

theoretical and experimental analysis of auctions with negative externalities abstract we investigate a private value auction in which a single entrant on winning imposes a negative externality on two regular bidders in an english auction when all bidders are active regular bidders free ride exiting before price reaches their values in a first price sealed bid auction incentives for free riding and aggressive bidding coexist limiting free riding compared to the english auction we find substantial though incomplete free riding in the clock auction in first price auctions regular bidders bid more aggressively than the entrant and both bid higher than in auctions with no externality predictions regarding revenue efficiency and successful entry between the two auctions are satisfied

innovative activity over the business cycle this paper examines cyclical patterns of innovative activity in the united kingdom over the period 1948 83 innovative activity turns out to have many of the properties of a random walk but does show a tendency to cluster during booms there is clear evidence of a long term secular relation between the level of innovative activity and the level of economic activity although this may have changed in the 1980s finally the data provide no reason for thinking that these clusters of innovation cause cyclic variations in economic activity but variations in economic activity do granger cause changes in innovative activity copyright 1995 by royal economic society