As vaccines for Covid-19 became available, in 2021 many countries introduced an obligation for employees to provide proof of their Covid status in the workplace, in Germany also known as the 3G rule (vaccinated, recovered, tested). In view of the controversial debate, concerns arose that...

As vaccines for Covid-19 became available, in 2021 many countries introduced an obligation for employees to provide proof of their Covid status in the workplace, in Germany also known as the 3G rule (vaccinated, recovered, tested). In view of the controversial debate, concerns arose that...

Highlights• In 2021 Germany introduced an obligation for employees to provide proof of their Covid-status in the workplace.• We examine whether employees circumvent the obligation to prove their status by taking sick leave.• Our findings indicate that the obligation led to additional days...

Highlights• In 2021 Germany introduced an obligation for employees to provide proof of their Covid-status in the workplace.• We examine whether employees circumvent the obligation to prove their status by taking sick leave.• Our findings indicate that the obligation led to additional days...

We present a closed form solution to the perpetual American double barrier call option problem in a model driven by a Brownian motion and a compound Poissonprocess with exponential jumps. The method of proof is based on reducing the initialirregular optimal stopping problem to an...

The multiple disorder problem consists of finding a sequence of stopping times which are as close as possible to the (unknown) times of ’disorder’ when the distribution of an observed process changes its probability characteristics. We present a formulation and solution of the multiple...

We present an explicit solution to the formulated in [17] optimal stopping problem for a geometric compound Poisson process with exponential jumps. The method of proof is based on reducing the initial problem to an integro-differential free-boundary problem where the smooth fit may break down...

We present a solution to the considered in [5] and [22] optimal stopping problem for some jump processes. The method of proof is based on reducing the initial problem to an integro-differential free-boundary problem where the normal reflection and smooth fit may break down and the latter then be...

We present solutions to some discounted optimal stopping problems for the maximum process in a model driven by a Brownian motion and a compound Poisson process with exponential jumps. The method of proof is based on reducing the initial problems to integro-differential free-boundary problems...

We present a solution to some discounted optimal stopping problem for the maximum of a geometric Brownian motion on a finite time interval. The method of proof is based on reducing the initial optimal stopping problem with the continuation region determined by an increasing continuous boundary...