International human resource management (IHRM) involves managing a multinational corporation's employees across different countries. There are three types of employees: host country nationals (HCNs) who are citizens of the country where operations occur; parent country nationals (PCNs) who are sent on assignment from the home country; and third country nationals (TCNs) from neither the home or host countries. Companies typically progress through four IHRM strategies - starting with an ethnocentric approach that favors PCNs, then a polycentric approach using more HCNs, followed by a geocentric strategy choosing the best employees globally. Finally, some adopt a regiocentric strategy managing regions rather than the