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Università della Svizzera italiana

Efficiency and regulation of the Slovenian electricity distribution companies

Filippini, Massimo ; Hrovatin, Nevenka ; Zorič, Jelena

In: Energy Policy, 2004, vol. 32, no. 3, p. 335-344

The Slovenian Energy Law, adopted in 1999, has opened the internal market to competition up to 64% of the final consumption. The opening of the internal market to foreign competition is envisaged for 2003. With regard to the methodology of price regulation, the Energy Law introduces the “price-cap” regulation, which aims to give firms incentive for cost reduction. To provide information for...

Università della Svizzera italiana

Robust GMM tests for structural breaks

Gagliardini, Patrick ; Trojani, Fabio ; Urga, Giovanni

In: Journal of Econometrics, 2005, vol. 129, no. 1-2, p. 139-182

We propose a class of new robust GMM tests for endogenous structural breaks. The tests are based on supremum, average and exponential functionals derived from robust GMM estimators with bounded influence function. We study the theoretical local robustness properties of the new tests and show that they imply a uniformly bounded asymptotic sensitivity of size and power under general local...

Università della Svizzera italiana

Robustness and ambiguity aversion in general equilibrium

Trojani, Fabio ; Vanini, Paolo

In: Review of Finance, 2004, vol. 8, no. 2, p. 279-324

We analyze the empirical predictions arising from settings of ambiguity aversion in intertemporal heterogenous agents economies. We study equilibria for two tractable wealth-homothetic settings of ambiguity aversion in continuous time. Such settings are motivated by a different robust control optimization problem. We show that ambiguity aversion affects optimal portfolio exposures in a way that...

Università della Svizzera italiana

The expiration of mandatory and voluntary IPO Lock-up provisions : empirical evidence from Germany’s Neuer Markt

Nowak, Eric

In: Advances in Financial Economics, 2004, vol. 10, p. 181- 200

This chapter explores the stock price impact of expirations of lock-up provisions that prevent insiders from selling their shares after the Initial Public Offering (IPO). We examine 172 lock-up expirations of 142 IPOs floated on Germany’s Neuer Markt. We detect significant negative abnormal returns and a 25% increase in trading volume surrounding lock-up expiration. The negative abnormal...

Università della Svizzera italiana

Adaptive query-based sampling of distributed collections

Baillie, Mark ; Azzopardi, Leif ; Crestani, Fabio

In: Lecture Notes in Computer Science, 2006, vol. 4209, p. 316-328

As part of a Distributed Information Retrieval system a description of each remote information resource, archive or repository is usually stored centrally in order to facilitate resource selection. The acquisition of precise resource descriptions is therefore an important phase in Distributed Information Retrieval, as the quality of such representations will impact on selection accuracy, and...

Università della Svizzera italiana

Principio economico e sovranità aziendale

Franchini, Igor ; Cencini, Alvaro (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2007 ; 2007ECO001.

Nella prima parte del lavoro, si propone un’analisi delle opere di dieci grandi economisti (Smith, Ricardo, Mill, Jevons, Walras, Marshall, Keynes, Hicks, Samuelson e Debreu) con una chiave di lettura specifica: la ricerca del vantaggio (o principio economico) come fondamento dell’economia. In particolare, si indaga l’evoluzione nel tempo di concetti economici di base quali la moneta e il...

Università della Svizzera italiana

Integrating knowledge through communication : an analysis of expert-decision making interactions

Mengis, Jeanne ; Eppler, Martin (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2007 ; 2007COM001.

This thesis sheds light on the communication processes through which experts and decision makers integrate their domain specific knowledge in decision making. Understanding knowledge integration as a communicative process, the study analyzes the communicative challenges that are present when communicating expert knowledge across its disciplinary boundaries and discusses practices to overcome...

Università della Svizzera italiana

Web usability : enhancing effectiveness of methodologies and improving their communication features

Triacca, Luca ; Paolini, Paolo (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2005.

The quality of web sites (or more in general interactive applications) may be improved taking into account the activity of usability evaluation, in which the quality for the endusers is defined and established. One of the most serious problems related to usability field is that usability evaluation methods often were not defined to be effectively reused by the people who did not invent them. The...

Università della Svizzera italiana

Technological change and outsourcing : competing or complementary explanations for the rising demand for skills during the 1980s?

Tchipev, Anton

This paper combines two of the popular approaches used in the trade versus technology debate: the factor content approach and the cost-share regression across manufacturing industries. The resulting method allows to decompose skill upgrading at the industry level into a component attributed to outsourcing and a residual. Surprisingly, computer investment explains the component attributed to...