Alternative ruin theory models:barrier stategies, generalized cramér-lundberg model

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One of the branches in actuarial science, called risk theory, analyzes important quantities related to the development of the surplus process of insurance companies. Such quantities are the probability of ruin, the deficit at the time of ruin, and the surplus immediately before ruin, for instance. These provide measures of the riskiness of the overall strategy of an insurance company. As a consequence, they suggest ways of improvement of the company's chances of avoiding insolvency (or ruin), as well as retaining competitive premium rates.