Automatic Formulation of Stochastic Programs Via an Algebraic Modeling Language

J. Thénié, C. VAN DELFT, J. Vial

Computational Management Science

janvier 2007, vol. 4, n°1, pp.17-40

Départements : Informations Systems and Operations Management, GREGHEC (CNRS)

Mots clés : Stochastic programming, Algebraic modeling language, Deterministic equivalent

This paper presents an open source tool that automatically generates the so-called deterministic equivalent in stochastic programming. The tool is based on the algebraic modeling language ampl. The user is only required to provide the deterministic version of the stochastic problem and the information on the stochastic process, either as scenarios or as a transitions-based event tree

Banking deregulation and Industry Structure: Evidence From the French Banking Act of 1985

M. Bertrand, A. Schoar, D. THESMAR

The Journal of Finance

avril 2007, vol. 62, n°2, pp.597-628

Départements : Finance, GREGHEC (CNRS)

We investigate how the deregulation of the French banking industry in the 1980s affected the real behavior of firms and the structure and dynamics of product markets. Following deregulation, banks are less willing to bail out poorly performing firms and firms in the more bank-dependent sectors are more likely to undertake restructuring activities. At the industry level, we observe an increase in asset and job reallocation, an improvement in allocative efficiency across firms, and a decline in concentration. Overall, these findings support the view that a more efficient banking sector helps foster a Schumpeterian process of “creative destruction.”

Brand Magic: Harry Potter marketing


Harvard Business Review

février 2007, vol. 85, n°2

Départements : Marketing

Brand management pour les business schools - Une véritable arme stratégique


Revue Française de Gestion

novembre-décembre 2007, vol. 33, n°178-179, pp.125-131

Départements : Stratégie et Politique d’Entreprise

De plus en plus de business schools investissent massivement dans la communication et dans des politiques de marque. L’auteur de l’article, rattachant ce phénomène à la mondialisation du secteur, analyse les différents ressorts de ces politiques et montre, par ailleurs, qu’elles ont pour conséquence de créer des barrières à l’entrée, pour décourager les nouveaux entrants potentiels. Il insiste enfin sur l’imbrication entre la marque d’une école et l’image du pays dans lequel elle est implantée

Calibration Accuracy of a Judgmental Process that Predicts the Commercial Success of New Product Ideas

T. B. ASTEBRO, D. Koehler

Journal of Behavioral Decision Making

octobre 2007, vol. 20, n°4, pp.381-403

Départements : Stratégie et Politique d’Entreprise, GREGHEC (CNRS)

Mots clés : intuitive judgment; forecasting; calibration; bootstrapping; case-based judgment

We examine the accuracy of forecasts of the commercial potential of new product ideas by experts at an Inventor's Assistance Program (IAP). Each idea is evaluated in terms of 37 attributes or cues, which are subjectively rated and intuitively combined by an IAP expert to arrive at a forecast of the idea's commercialization prospects. Data regarding actual commercialization outcomes for 559 new product ideas were collected to examine the accuracy of the IAP forecasts. The intensive evaluation of each idea conducted by the IAP produces forecasts that accurately rank order the ideas in terms of their probability of commercialization. The focus of the evaluation process on case-specific evidence that distinguishes one idea from another, however, and the corresponding neglect of aggregate considerations such as the base rate (BR) and predictability of commercialization for new product ideas in general, yields forecasts that are systematically miscalibrated in terms of their correspondence to the actual probability of commercialization.

Challenges facing business schools in the future


Journal of Management Development

2007, vol. 26, n°1, pp.87-92

Départements : Stratégie et Politique d’Entreprise

Keywords: Business schools; Curricula; Marketing strategy; Innovation.

Code and Conduct in French Cuisine: Impact of code changes on external evaluations

R. DURAND, H. Rao, P. Monin

Strategic Management Journal

mai 2007, vol. 28, n°5

Départements : Stratégie et Politique d’Entreprise, GREGHEC (CNRS)

We study the effects of organizational code-preserving and code-violating changes on externalevaluations by third parties'an essential but under-studied strategic outcome. We define codepreservingchanges as a variation in the firm's product range that preserves the social codewithin which the firm positions its offering. By contrast, a code-violating change correspondsto a variation in the product range that breaks with past codes and embraces another socialcode. Our analyses of French haute cuisine restaurants show that code-preserving changes andcode-violating changes have positive effects on external evaluations. Both effects decline withprior evaluations received by the organization, but only the effect of code-violating changesis reduced with age. Moreover, external evaluations improve when restaurants undertake morecode-preserving changes than their direct competitors but decline when they make more codeviolatingchanges than competitors. These results enable us to derive implications for researchon strategic change, strategic groups, and strategic social positioning. Keywords code ' strategic changes ' external evaluations ' social positioning

Collusion and the organization of delegated expertise


Journal of Economic Theory

novembre 2007, vol. 137, n°1, pp.271-299

Départements : GREGHEC (CNRS)

Mots clés : Expertise; Organization; Collusion

Company-Related Offences in French Legislation


Journal of Business Law

janvier 2007, pp.1-15

Départements : Droit et fiscalité, GREGHEC (CNRS)

In France as in many legislations, company managers run the risk of certain sanctions under criminal law. In France, some offences concern the misappropriation of company property for the personal benefit of managers: for instance, the offences of misuse of company property, or misuse of credit, where the magistrate must determine whether or not the actions giving rise to the prosecution were undertaken in the interests of the company. It is difficult to prove that property has been used contrary to the company's interest when the case involves a group of companies, particularly when financial assistance has been provided by one group company to another.Another group of offences concerns control over companies. There are many cases of offences involving information reported to partners or managers. Failures to draw up certain required documents, and incorrect allocations of entries, confer on company accounts a role in exposing offences

Competition of Brands - Or of Business Models ?


Advertising Age

2007, vol. 78, n°9, pp.16

Départements : Marketing

The article discusses methods to build a product brand. Brands have long been accepted as ways of creating customer loyalty and driving corporate growth. Marketers can capitalize on this by building a company's brand from within, but they must make sure not to fall in love with the brand itself and forget the bigger picture*BRAND choice*BRAND name products*CORPORATIONS -- Growth*MARKETING*PRODUCT management