What do patroon and proprietary colonies have in common?

Areal estate salesperson is often approached by home buyers of a particular race. his usual practice is to show them homes in neighborhoods where most of the residents are the same race as the buyers. he avoids showing these buyers properties in integrated areas. this is called:

Why are the majority of the world's economies mixed? what may happen to the "pure" types of economies (traditional, socialist/command, market capitalist) when they incorporate elements from other economic models?

Who was the macedonian conqueror of greece and builder of an empire?