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AMS Acta (10.546 recursos)

Repository of the University of Bologna.

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Mostrando recursos 1 - 20 de 1.701

  1. Analisi di sopravvivenza e modelli di durata della disoccupazione: l'evidenza empirica di un caso

    Balugani, Federica; Pistoresi, Barbara
    In questo lavoro si utilizza analisi di sopravvivenza per stimare la durata della disoccupazione attraverso un modello parametrico di azzardo proporzionale con ipotesi di distribuzione Weibull. Le variabili considerate nell' analisi riguardano le caratteristiche personali e della storia lavorativa passata degli individui iscritti alle liste di disoccupazione. I dati sono relativi agli iscritti all' Ufficio di Collocamento della provincia di Modena nell' Aprile 1991.1 risultati non mostrano l'esistenza di una significativa dipendenza dalla durata, qualora si tenga conto della eterogeneità tra i lavoratori. Cio significa che non vi è dipendenza, nè positiva nè negativa, della probabilità di uscita dalla disoccupazione...

  2. Monopoly à la Hotelling

    Lambertini, Luca
    In this short note, the behaviour of a monopolist in a horizontally differentiated market is analysed. It turns out that her incentive to differentiate is nihil, while both the optimal location choice and the optimal pricing rule depend on the relative size of the parameters involved in the model.

  3. German "Universal Banking" as a Model for US Banking Reform

    Kregel, Jan A.
    The German 'Universal Bank' Form has frequently suggested as a model for the reform of U.S. Banking system because it does not restrict banks by means of market segmentation of their activities. This paper looks at the historical evolution of financial institutions in Germany and its modern structure. It concludes that the success of the German financial system is less due to the fact that German banks can operate in all financial markets than the unique financial supervisory structure which controls banks balance sheets, and the structure of financial asset holdings in Germany, which is primarily due to impact of...

  4. Cost-Efficiency Analysis of a Regulated Public Service: the case of Regional Bus Services in Italy

    Fazioli, Roberto
    This paper represents an application of the so-called evaluative or performance-approach to the analysis of a regulated sector as public transport. The aim of this work is to provide more information to the debate on the privatization programmes. A translog cost function for a five- year panel is estimated and measures of economies of scale and density are derived. Indeed, from the derived cost-efficiency frontier evidence for scale inefficiency and overall cost inefficiency can be noted for 40 regional bus companies in Emilia Romagna. The estimation results allow for a discussion of inefficiency in terms of sub-optimal scale and density....

  5. Il concetto di integrazione verticale come strumento analitico e come comportamento strategico: alla ricerca di una continuita' tra analisi economica ed economia industriale

    Lambertini, Luca
    L'obiettivo di questo lavoro è quello di delineare il ruolo ricoperto dal concetto di integrazione verticale nell'analisi del processo di creazione della ricchezza sia sotto il profilo aggregato, che interessa l'analisi economica, sia sotto il profilo individuale, che interessa la teoria dell'impresa e la teoria dell'organizzazione industriale.

  6. Tempo e giustizia nella conciliazione vita-lavoro

    Neri, Massimo; Rinaldini, Matteo; Perulli, Angela; Corsi, Giancarlo; Giovannetti, Enrico; Masino, Giovanni; Maggi, Bruno
    Work-life balance is one of the current issues within the academic, political, and managerial debate. An article discussed in a TAO Research Programs seminar held in June 2015 at the University of Modena and Reggio Emilia, suggests a critical interpretation of the mainstream literature and its related controversial results in terms of work-life reconciliation practices. The article also provides an alternative analytical framework based on Bruno Maggi’s organization theory, Norbert Elias’ theory of time, and Amartya Sen’s theory of justice. Scholars from different universities and disciplines contribute with comments on the notions of time, justice, organization and the proposed interpretative...

  7. Consenso informato e responsabilità medica per trattamento sanitario arbitrario


    Il presente Progetto di ricerca collettivo si propone di analizzare il complesso quadro della responsabilità medica a seguito di trattamento sanitario eseguito in assenza o in difformità dal consenso del paziente. Il tema, dopo un lungo e travagliato iter giurisprudenziale, è stato portato innanzi alle Sezioni Unite della Corte di cassazione che, con la nota sentenza Giulini del 2008, ha affermato il principio di diritto secondo cui il trattamento eseguito senza consenso ma condotto nel rispetto delle regole dell'arte medica e seguito da esito fausto non comporta una responsabilità penale del medico. A tale opzione ermeneutica è stato contestato di essere eccessivamente sbilanciata verso l'esito del trattamento, concepito...

  8. Optimal Tariff Policy and Endogenous Market Structure

    Cordella, Tito; Vannini, Stefano
    Strategic trade policy affects foreign-based furn's internationalization mode. In this paper, we endogenize market structure and tariff policy by considering a sequential game in which (i) a policy-maker maximizes national welfare, (ii) aforeign-based furn decides whether to supply the host-country market by exports orby activating a local plant, (iii) a local furn decides whether entering or not the domestic market, (in) both Gums choose output. We show that optimal tariff policy does no tallow for the existence of multinational enterprises at equilibrium (when transportation costs are neglected). Tile link between national welfare and fixed costs is fairly complex and counterintuitive...

  9. Curvatura della funzione di costo, differenziazione verticale e benessere

    Lambertini, Luca
    Lo Scopo di questo lavoro è quello di analizzare il rapporto tra curvatura della funzione di costo, qualità del prodotto e benessere nell'ambito di un modello di differenziazione verticale net cast di monopolio privato, monopolio pubblico e duopolio privato. I risultati generati dal modello consentono inoltre di avanzare alcune considerazioni riguardanti quella che è nota in letteratura come ipotesi schumpeteriana.

  10. Inflazione e gestione del debito pubblico: una prima valutazione per l'Italia

    Scorcu, Antonello Eugenio
    In Una situazione in cui la strategia di politica economica è temporalmente coerente, l'ammontare e la struttura per scadenze del debito pubblico segnalano le preferenze del policy maker e contribuiscono a determinare il tasso ottimale d'inflazione. II lavoro, tramite l'analisi di cointegrazione, verifica l'esistenza di tale legame. Nel periodo 1960-91 emerge Una relazione di lungo periodo tra il tasso d'inflazione e i rapporti debito a breve/PIL, debito a lungo/PIL e debito verso la Banca d'ltalia/PIL. Nel breve periodo il tasso d'inflazione appare influenzato anche dal saldo della bilancia commerciale.

  11. On the Limitations of the Implicit Morality of the Market: A Perspective from Modern Economic Analysis

    Zamagni, Stefano
    The paper explores the norms and values supporting the market as a social institution,seeking to outline them explicitly. After this, it addresses the following questions: what dimensions of value in things, relationships and persons are acknowledged or ignored by the norms of the market? Second, what are the ideals of self and society that the market attempts to embody? Third, does the extension of the market to a certain realm undermine the realization of other ideals? The main point of the paper is that market forces must embedded in supportive, but constraining, social, institutional and normative frameworks.

  12. Towards A One World Development Path: the Case for Grassroots Development

    Zamagni, Stefano
    After a brief description of the diversity of development experiences in the post-warperiod, the paper considers the three most important lessons stemming from those experiences. An explanation of the contrast between grassroots and macro development performance is then offered together with a characterization of the notion of participatory development as a launching pad for a new development impulse. The paper concludes with a defence of publication as a precondition for the starting up of a one-world development path.

  13. Equilibrium Locations in the Unconstrained Hotelling Game

    Lambertini, Luca
    In this paper, we try to analyse the optimal location choice in a standard game of horizontal differentiation in which firms are free to locate outside the city boundaries. It turns out that the unique Nash equilibium exhibits a finite distance between the sellers, so that the maximum differentiation principle is not confirmed. Moreover, the two symmetric Stackelberg equilibria exhibit the same degree of differentiation observed when the game is non cooperatively played within the city, except that the leader locates at the center.

  14. Ruolo e limiti della politica monetaria

    Fazio, Antonio
    Nel classico “The Role of Monetary Policy”, del 1968, Milton Friedman affermava che il tentativo di tenere a livelli artificialmente bassi, attraverso la politica monetaria, il tasso d'interesse e la disoccupazione era destinato all'insuccesso; a causa dell'effetto che 1'espansione monetaria eccessiva finisce per avere sull'inflazione attesa, con i conseguenti effetti di ritorno sugli stessi tassi d'interesse e sull'occupazione. Riecheggiano in queste tesi una serie di assunti e suggestioni della teoria economica e classica: Wicksell sul saggio naturale d'interesse; Irving Fisher Sui rapporti tra tasso d'interesse e prezzi; la teoria quantitativa della moneta, del cui rilancio Friedman stato protagonista, e della...

  15. Financial Fragility and the Structure of Financial Markets

    Kregel, Jan A.
    This paper investigates the role of financial stucture on he financial fragility of the economy. It argues that while strucures is indipendent of the degree of what Misky calls financial fragility, it will have an impact on the rate of contagion by which financial fragility produces general economic instability. This is independent of the traditional view of instability as being caused by financial intermediation creating a mismatch of maturities of financial institutions' asset and liabilities, but is linked to the quality of the assets against which banks lend when there is a rapid increase in resources intermediated by banks. It...

  16. Instability of the Economy and Fragility of the Financial Structure

    Kregel, Jan A.
    This paper seeks to extend Coase's explanation of the existence of firms in general to financial firms and the financial markets in particular. Fianancial firms are defined as “producting prices” of financial assets. It also seeks to describe market structure in terms of constellations of different types of financial firms, leading to a continuum of a market configurations ranging from less to more internal integration of financial market structures are compared and assessed. Finally, the symbiosis between manufacturing and financial structures is discussed.

  17. Testing the Life Cycle Model of Consumption: What Can We Learn From Micro and Macro Data?

    Attanasio, Orazio P.; Browning, Martin
    In this paper we analyze the implicaions of the life cyrcle model for consumption and consider the possibility of testing the model using macro and micro data. We conclude that the implications of the model cannot be tested with macro data, whose analysis, however, is useful for forecats. We provide some evidence from US and UK micro datasets which shows that the life cycle model, at a first glance, is not unconsistent with tha data.

  18. Determinanti della formazione di imprese nei servizi alla produzione in Italia

    Piergiovanni, Roberta; Santarelli, Enrico
    This paper deals with the determinants of new furn formation in the business servicesin Italy during the second half of the 19805. For this purpose we use the data base made recentlyavailable by the National Instimte of Social Security, which provides information on both newly andalready established firms with at least one employee. Two birth rates are computed and analysed forthe 95 Italian provinces: the first one is an index of fertility represented by the share of newenterprises on employees, the second one is a typical birth rate represented for each province by theratio between new enterprises and resident population....

  19. Collective Action, Strategic Behaviour and Endogenous Growth

    Bianchi, P.; Miller, L.
    This paper is devoted to exploring the social dynamics of economic behaviour specifically how to encourage endogenous growth. Innovation, the key to successful competition, and therefore growth, must be futher understood. The tecnological aspects of innovation are important, but their presence does not always result in innovation. It will be argued that the organization of the collective is the key to the establishment of the social mechanisms necessary to incorporate change without threatening the system as a whole. The paper concludes with a discussion of policy implications.

  20. Stackelberg equilibria and horizontal differentiation

    Lambertini, Luca
    This paper proposes a taxonomy of the Stackelberg equilibria emerging from a standard game of horizontal differentiation à la Hotelling in which the strategy set of the sellers in the location stage is the real axis. Repeated leadership appears the most advantageous position. Furthermore, this endogenously yields vertical differentiation between products at equilibrium.

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