Gruber, MarcHaas, Melvin2013-08-062013-08-062013-08-06201310.5075/epfl-thesis-5830https://infoscience.epfl.ch/handle/20.500.14299/93901urn:nbn:ch:bel-epfl-thesis5830-7ennecessity entrepreneurshipself-employmentunfavorable circumstancesunemploymentindividual factorspersonality traitsenvironmental influencestheoryconceptual modelwork satisfactionjob satisfactionsocial supportcofoundersoutcome measurespolicy supportgovernmental contributionpolitical strategyinternational comparisonNecessity Entrepreneurship : Individual, Environmental and Public Policy-Related Factors Influencing the Process of Opportunity Exploitation under Unfavorable Circumstancesthesis::doctoral thesis