RDTELEC.DES

rd        sales     rdintens  lrd       lsales    salessq   

  Obs:   29

 1. rd                            R&D spending, millions $
 2. sales                         firm sales, millions $
 3. rdintens                      rd as percent of sales
 4. lrd                           log(rd)
 5. lsales                        log(sales)
 6. salessq                       sales^2