replace permits estout to overwrite an existing file.

    append specifies that the output be appended to an existing file. It may
        be used even if the file does not yet exist.

    type specifies that the assembled estimates table be printed in the
        results window and the log file. This is the default. Use notype to
        suppress the display of the table.

    showtabs requests that tabs be displayed as <T>s in both the results
        window and the log file instead of in expanded form. This option does