Jani Kinnunen

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Facebook use is a ubiquitous part of contemporary life. Based on user interviews this paper probes the performative actions presenting self on Facebook. Instead of a medium or a place Facebook usage is approached as a collection of social situation. The findings support earlier small scale studies of Facebook use and find that Facebook is mostly a playful(More)
In this paper the notion of generalized possibilistic risk premium is introduced as a measure of the risk aversion of an agent faced with several components of possibilistic risk. The main result of the paper is a formula for the calculation of the generalized possibilistic risk premium expressed in terms of a utility function and of some possibilistic(More)
This paper views operating synergies as real options that acquiring companies have in the post-acquisition M&A process. The paper builds on the synergistic restructuring theory, which states that both acquisitions and divestitures are wealth-creating activities. Acquisition synergies are broadly defined as arising both from resource redeployments between(More)
This paper studies a mixed model of saving with three risks: labor income and interest rate risks are random variables and background risk is a fuzzy number. Two notions of precautionary saving are introduced, measuring the effect of these types of risk on optimal saving and necessary and sufficient conditions on their non-negativity are proved. This leads(More)
In this paper we propose an approach of risk aversion for the situations with many risk parameters. Some of the parameters are described probabilistically, and others possibilistically. We introduce mixed risk premium vector, a notion, which combines probabilistic and possibilistic aspects of risk aversion. The main result of the paper is a formula for the(More)
This paper treats risk based on the notions of credibility measure and credibility expected value. Firstly, the paper derives and discusses the credibility expected value. Secondly, the paper presents a new method of analysis of possibilistic portfolios. The new step is a construction by which with a possibilistic portfolio one associates a probabilistic(More)
This paper studies mixed models of saving with three types of risks: labor income risk, interest rate risk, and background risk. Each risk can be probabilistically modeled by a random variable or possibilistically modeled by a fuzzy number. For each model a notion of precautionary saving is defined in order to measure the effect that various types of risk(More)