Una generalizzazione del modello Inferenziale bayesiano «Poisson-Gamma». Application in assicurazioni malattia

Si propone una semplice generalizzazione del tradizionale modello «Poisson pesato con distribuzione gamma», atta a rappresentare casi in cui i numeri aleatori del processo di osservazione non sono giudicati ugualmente distribuiti. Tale generalizzazione ha interessanti applicazioni nella problematica attuariale relativa a coperture assicurative a rischio crescente nel tempo. In particolare vengono qui prese in considerazione applicazioni in assicurazione malattia, inerenti alla definizione di un sistema di «experience rating».     

Productivity, wages and intrinsic motivations

There is a long-standing debate in labour economics on the impact of workers’ intrinsic motivations on equilibrium wages. One direction in economic theory suggests that intrinsically motivated workers are willing to accept lower wages and “donate” work, for example, in terms of unpaid overtime (the donative-labour hypothesis). In the other direction, intrinsic motivations are expected to increase worker productivity and, in turn, wages (the intrinsic motivation-productivity hypothesis). Using a new database of a sample of workers in the cooperative non-profit sector, we find that, consistently with the motivation-productivity hypothesis, more motivated workers earn significantly higher wages, which signals higher productivity. Evidence supporting the donative-labour hypothesis is weaker, even though a generally positive connection between motivations and work-donation is confirmed. We interpret these findings by arguing that the impact of the donative-labour effect is dominated by the intrinsic motivation-productivity effect.     

Do cooperative enterprises create social trust?

This article contributes to the literature by carrying out the first empirical investigation into the role of different types of enterprises in the creation of social trust. Drawing on a unique data set collected through the administration of a questionnaire to a representative sample of the population of the Italian Province of Trento in March 2011, we find that cooperatives are the only type of enterprise where the work environment fosters the social trust of workers.     

Why are social enterprises good candidates for social innovation? Looking for personal and institutional drivers of innovation

The last few years witnessed theoretical and practical contributions to the field of social innovation and social enterprise. However, analysis of the interplay between these two different realms is still limited. This article aims to fill some gaps in this respect. We deal with historical reconstruction of the concept of Social Enterprise and Social Innovation, and their conceptual premises. We consider the process of creation of social innovation in social enterprises. As members’ motivations, ownership rights and governance rules in social enterprises create a new relational context and new routines, which are germane to the production of social knowledge and deliberation, social innovation can be considered one of the main outcomes of this setting. Social motivations, collective action of a cooperative kind, multi‐stakeholder governance and socialization of resources, and their interplay are singled out as main drivers of innovation. Social innovation is seen as akin to novelty in social interaction, a non‐standardized and non‐standardizable outcome of the operation of this organizational form.     

The external cost of asbestos in the housing market

This study uses a Generalized Method of Moments spatial error hedonic model to estimate the potential impact of asbestos on residential property prices. The analysis examines a large sample of 32,403 housing sales occurring between 2008 and 2015 in a fast-growing Coastal Alabama region. Results indicate the presence of asbestos depreciates house values by 13.44%, translating into an external cost of approximately $25,300 per property.     

Heterogeneity and uncertainty in a multistate framework

Decisions in Economics and Finance - This research develops the scheme proposed in the paper Pollard [J Inst Actuar 96(2): 251–264, 1970], which is based on a two-state model for the analysis...     

Su una generalizzazione del problema del commesso viaggiatore

Come detto nell’introduzione, si propone un particolare algoritmo di enumerazione implicita per la determinazione, su un grafo, di un circuito di massima « utilità » totale, essendo assegnata una massima penalità totale.     

Alcuni approcci inferenziali per processi di arrivo dei sinistri

Vengono esaminati tre modelli atti a rappresentare aspetti strutturali ed inferenziali del processo dei numeri aleatori annui di sinistri relativi ad un rischio assicurato. In particolare ci si sofferma su un modello costruito misturando processi a catena markoffiana; per questo modello viene proposto un approccio che riteniamo interessante anche dal punto di vista applicativo. Il confronto tra i diversi modelli viene condotto anche sulla base di alcuni risultati numerici.     

THE EXTENDED GOVERNANCE OF COOPERATIVE FIRMS: INTER‐FIRM COORDINATION AND CONSISTENCY OF VALUES

This work aims at providing a framework for the analysis of governance in networks of cooperative firms. It builds on four bodies of literature: cooperation, transaction costs, monopoly capitalism, production networks. The framework associates the specific principles that define the identity of cooperative organizations (self‐help, member ownership, democratic control, financial participation, limited capital remuneration) alongside more general governance levels (embodied values, property rights, control, resource allocation). We then apply the same dimensions to production networks and propose a stylized networking model for cooperatives. We introduce market power, and identify two polarized types of networks: (1) heterarchical forms of coordination based on cooperation and mutual help, (2) hierarchical coordination based on exclusive direction. We compare both types with our normative framework providing examples and brief case studies for each network type. Recommendations to scholars and practitioners point at the opportunity to discriminate inter‐firm relations and production development strategy in terms of the values of cooperation, at all governance levels.     

Early warning indicators and macro-prudential policies: a credit network agent based model

Credit network configurations play a crucial role in determining the vulnerability of the economic system. Following the network-based financial accelerator approach, we constructed an agent based model reproducing an artificial credit network that evolves endogenously according to the leverage choices of heterogeneous firms and banks. Thus, our work aims at defining both early warning indicators for crises and policy precautionary measures based on the endogenous credit network dynamics. The model is calibrated on a sample of firms and banks quoted in the Japanese stock-exchange markets from 1980 to 2012. Both empirical and simulated data suggest that credit and connectivity variations could be used as early warning measures for crises. Moreover, targeting banks that are central in the credit network in terms of size and connectivity, the capital-related macro-prudential policies may reduce systemic vulnerability without affecting aggregate output.