Tipping, in various situations, is definitely a cultural thing which easily changes - even from the US to Europe. Guidebooks almost universally will tell you about what is expected. Different places handle different situations differently as well, such as tipping in a restaurant, to a bellhop, or to a taxi.
Similarly bargaining is diverse as well. You may not think of it, but in the US you bargain back and forth for big ticket items (cars, houses) but not little things. In many east Asian countries it is the opposite, you bargain with street salesmen but not for a motorcycle or car.
Similarly bargaining is diverse as well. You may not think of it, but in the US you bargain back and forth for big ticket items (cars, houses) but not little things. In many east Asian countries it is the opposite, you bargain with street salesmen but not for a motorcycle or car.