The Path-goal model reference article from the English Wikipedia on 24-Jul-2004
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Path-goal model

Helping orphans the way you would do it
The path-goal model is a leadership theory developed by Robert House. It states that a leader's function is to clear the path toward the goal of the group, by meeting the needs of subordinates.

House defined four leadership styles:

In contrast to the Fiedler contingency model, the path-goal model states that the four leadership styles are fluid, and that leaders can adopt any of the four depending on what the situation demands.