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==Formal definition==
Consider the model
: <math>y_{it} ~=~ \gamma_{s(i)} + \lambda_t + \delta I + \varepsilon_{it}</math>
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No edit summary Tag: Reverted |
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Line 9:
==Formal definition==
Consider the model
: <math>y_{it} ~=~ \gamma_{s(i)} + \lambda_t + \delta I + \varepsilon_{it}</math>
|