Add the paprika, chili powder, cumin, oregano, salt and pepper. Cook, stirring, until the spices are toasted, 1 to 2 minutes. Add the chicken stock and use a wooden spoon to lift any brown bits on the bottom of the pot. Return the browned beef to the pot and add the bay leaves, olives and raisins, if using. Bring the liquid to a simmer, cover with a lid, reduce the heat to low and cook, stirring occasionally, for 60 minutes.