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 __   _    _    _     _  _     _____    _    _   
| || | || | || | ||  | \| ||  |  ___|| | || | || 
| '--' || | || | ||  |  ' ||  | ||__   | || | || 
| .--. || | \\_/ ||  | .  ||  | ||__   | \\_/ || 
|_|| |_||  \____//   |_|\_||  |_____||  \____//  
`-`  `-`    `---`    `-` -`   `-----`    `---`

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Text this: Common factors and common breaks in panels : an empirical investigation