01204nam a22002771i 450099100208605970753620040123152239.0040407s2003 it |||||||||||||||||eng b12868619-39ule_instARCHE-084823ExLDip.to Scienze StoricheitaA.t.i. Arché s.c.r.l. Pandora Sicilia s.r.l.338.9Medda, Giuseppe485928On the relationship between R&D and productivity :a treatment effect analysis /Giuseppe Medda, Claudio Piga and Donald S. SiegelMilano :Fondazione ENI Enrico Mattei,20031 v. ;21 cmNote di lavoro della Fondazione ENI Enrico Mattei ;34.2003Politica economicaPiga, Claudioauthorhttp://id.loc.gov/vocabulary/relators/aut136777Siegel, Donald S..b1286861902-04-1416-04-04991002086059707536LE009 GEOG.COLL.14L/3412009000319738le009-E0.00-l- 00000.i1342951616-04-04On the relationship between R&D and productivity1448615UNISALENTOle00916-04-04ma -engit 01