HEC Paris

About: HEC Paris is a education organization based out in Jouy-en-Josas, France. It is known for research contribution in the topics: Market liquidity & Entrepreneurship. The organization has 584 authors who have published 2756 publications receiving 104467 citations. The organization is also known as: Ecole des Hautes Etudes Commerciales & HEC School of Management Paris.

Exploring user emotion in microblogs for music recommendation

Abstract: Utilize microblogs to extract users' emotions.Correlate users, music and the users' emotion.Develop an emotion-aware method to perform music recommendation. Context-aware recommendation has become increasingly important and popular in recent years when users are immersed in enormous music contents and have difficulty to make their choices. User emotion, as one of the most important contexts, has the potential to improve music recommendation, but has not yet been fully explored due to the great difficulty of emotion acquisition. This article utilizes users' microblogs to extract their emotions at different granularity levels and during different time windows. The approach then correlates three elements: user, music and the user's emotion when he/she is listening to the music piece. Based on the associations extracted from a data set crawled from a Chinese Twitter service, we develop several emotion-aware methods to perform music recommendation. We conduct a series of experiments and show that the proposed solution proves that considering user emotional context can indeed improve recommendation performance in terms of hit rate, precision, recall, and F1 score.

Finding and Implementing Energy Efficiency Projects in Industrial Facilities

Abstract: This study addresses the challenges of finding and implementing profitable energy efficiency (EE) projects, a critical foundation for sustainable operations. We focus on manufacturing enterprises, but many of our findings apply also to the back office of service operations. Our starting point is that, in nearly every industrial enterprise, there are many profitable EE projects that could be implemented but are not. An oft-cited hindrance to implementation is the lack of an internal management framework in which to find, value, and execute these projects. Using a conceptual approach, we rely on proven sustainable operations tools to develop such a framework. We identify three major value drivers of EE projects: savings intensity, “green” image, and project complexity. We then describe a framework for understanding the context of EE projects in industry, with an underlying analytic foundation in optimal portfolio analysis. A case study of a large manufacturing site is used to illustrate emerging best practices—based on Kaizen management principles—for integrating EE project management with operations, engineering, and strategy.

Recursive Methods in Discounted Stochastic Games: An Algorithm for δ→ 1 and a Folk Theorem

Abstract: We present an algorithm to compute the set of perfect public equilibrium payoffs as the discount factor tends to 1 for stochastic games with observable states and public (but not necessarily perfect) monitoring when the limiting set of (long-run players') equilibrium payoffs is independent of the initial state. This is the case, for instance, if the Markov chain induced by any Markov strategy profile is irreducible. We then provide conditions under which a folk theorem obtains: if in each state the joint distribution over the public signal and next period's state satisfies some rank condition, every feasible payoff vector above the minmax payoff is sustained by a perfect public equilibrium with low discounting.

Jules or Jim: Alternative Conformity to Minority Logics

Abstract: To what extent do organizations respond favorably to minority participation-that is, conform to demands from minority resource suppliers that hold an unconventional logic? A favorable response to minority participation (i.e., "alternative conformity") helps decrease the influence of dominant players, alter the resource suppliers' social structure, and promote new logics, which makes alternative conformity a "son control strategy" for organizations. We expect a positive relationship between minority participation and alternative conformity and expect that relationship to be attenuated by organizations' adherence to a dominant logic, the centrality of minority logic holders, and a minority logic's institutional credit. We test and find strong support for our hypotheses using original data on investment funds in the French film industry (1994-2008).

Herding and Social Media Word-of-Mouth: Evidence from Groupon

Abstract: This study explores how herding, social media word-of-mouth (WOM), and their interaction effects drive product sales. While herding helps updating consumers’ beliefs about the product quality, social media WOM can also have an advertising effect. Using a panel data set consisting of about 500 deals from Groupon, we find both herding and Facebook-mediated WOM has a direct impact on sales, whereas Twitter-mediated WOM does not. More importantly, we theorize the interaction effect between herding and social media WOM and show they are complements in driving product sales. To uncover the underlying mechanisms, we find the herding effect is more salient for experience goods than for search goods, but the effect of Facebook-mediated WOM does not significantly differ between the two product categories. The comparison suggests that signaling product quality is the underlying mechanism of herding, while the effect of Facebook-mediated WOM is primarily through advertising, rather than signaling.