The conditional probability and the linear flow graph approaches to analyzing probabilistic causal systems

An alternative theoretical approach to the analysis for dichotomous causal systems that involve probabilistic causation, the conditional probability approach, has recently been explicated. It was shown that there exist various composition and decomposition rules for analyzing various kinds of general causal systems, and an important distinction between pure-“or”-and pure-“and”-causal systems was explicated. In this paper these earlier results are used to analyze a causal system which has been studied by J.A. Davis (1976), who uses his linear flow graph approach to analysis. The results of the conditional probability approach are compared to the linear flow graph, and it is shown that the two approaches lead to strikingly different results.     

THE RELATIONSHIP BETWEEN FOOD PRODUCTION AND CONSUMPTION VARIABILITY: POLICY IMPLICATIONS FOR DEVELOPING COUNTRIES

This paper examines whether there is increased inter-year instability in food consumption at the national level, and to what extent this is attributable to increased instability of food production in the wake of adoption of modern agricultural technology. The data analysed indicates that increased production instability does translate into increased fluctuations in consumption. Nevertheless, year-to-year consumption variability among the sample of 38 countries has declined during the past 25 years. This is attributed to improved stocking operations and trade practices which accompany economic growth. Nevertheless, food insecurity, as measured in terms of fluctuations around trend levels of consumption, does remain a problem, especially among the poor. Therefore, policy options to reduce consumption instability are outlined.     

Invention under uncertainty and the threat of ex post entry

This article proposes a theoretical framework for studying the invention of new products when demand is uncertain. In this framework, under general conditions, the threat of ex post entry by a competitor can deter invention ex ante. Asymmetric market power in the ex post market exacerbates the problem. The implications of these general results are examined in a series of examples that represent important markets in the computer industry. The first is a model that shows how an operating system monopolist, by its mere presence, can deter the invention of complements, to its own detriment as well as that of society. The implications of policies such as patent protection, price regulation, and mandatory divestiture are considered. Three additional examples consider the ability of a monopolist in one market to commit to bundling an unrelated product, a pair of horizontally differentiated firms that can add a new feature to their products, and a platform leader that can be challenged in its base market by the supplier of a complementary product.     

On Schumpeter, Services and Economic Change

Abstract . Joseph A. Schumpeter, the Austrian-American economist, worried about “Can capitalism survive” a generation ago, and so far it has. But his work poses these questions: How do growth and change take place in a free enterprise economy? Can his model for expansion through innovation and creative destruction through the competitive process be a basis for understanding present day industrial economies? He emphasized that capitalism was an evolutionary system and that the very need for newness or rejuventation should insure continual change in it. With respect to declining industries and firms the task of economics was to turn what might have been a rout into orderly retreat. And so he gave a limited blessing to certain monopoly practices deriving from a broader strategy, risk avoidance. Schumpeter's entrepreneurs have disappeared but innovative ability still is exercised, largely through issue-specific consulting services in the burgeoning service sector, services that foster stability as well as change     

Auditor changes,information quality and bankruptcy prediction

In periods of financial distress management may attempt to suppress unfavorable information from creditors and investors through the use of undisclosed changes in accounting methods, estimates and procedures, thus reducing the quality of the information contained in the firm's financial statements. The auditor's role in this context is to ensure that such compromise does not take place. If the auditor does not permit such accounting treatments, the company may choose to switch to another auditor who will. Empirical evidence relating auditor-change behavior to the quality of comparative bankruptcy prediction models provides support for the notion that auditor changes before bankruptcy may be at least partially due to lack of success at suppressing unfavorable information with the current auditor. Conversely, non-auditor switching companies appear to enjoy greater success at suppressing negative income and leverage information.     

Retail Leasehold Interests: A Contingent Claim Analysis

This paper develops a contingent claim model to analyze certain aspects of retail leasehold contracts. The approach allows for the explicit consideration of risk without any ad hoc risk adjustment. Both "straight" leases and "percentage" leases are examined with the value of sales as the underlying asset. Each lease value is expressed as a combination of options on sales. The effects of the lease value's determinants and equilibrium risk measurements are also analyzed.     

Location: A Neglected Determinant of Firm Growth

This paper links the performance of new technology firms, measured in terms of employment growth, to geographic location. We introduce a model of firm growth that is specific to characteristics of the location as well as the firm and industry. The model is estimated using a unique data set identifying the growth performance of small technology-based firms in Germany. We find that firm performance, as measured by employment growth, does appear to be influenced by locational characteristics as well as characteristics specific to the firm and the industry. In particular, the empirical evidence suggests that being located in an agglomeration rich in knowledge resources is more conducive to firm growth than being located in a region that is less endowed with knowledge resources. These results suggest the economic value of location as a conduit for accessing external knowledge resources, which in turn, manifests itself in higher rates of growth. JEL no. L10, R11, O12, O30