Hi,

Using OLS, I have panel data of 480 firms (10years).

reg lev prof size tang growth liq i.lifecycle i.industry i.year

lifecycle is a dummy variable created after categorization each of the firm year of the sample into different life cycle stages. A firm can have different life cycle stages in different year.

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As it is a panel data, I will use fixed effects.

xtreg lev prof size tang growth liq, fe

Is this right? The lifecycle dummy is important as I need to interprete it. But how can I include the life cycle dummy in my fixed effect model?