?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Feprints.imtlucca.it%2F2245%2F&rft.title=A+generalized+preferential+attachment+model+for+complex+systems&rft.creator=Yamasaki%2C+Kazuko&rft.creator=Matia%2C+Kaushik&rft.creator=Fu%2C+Dongfeng&rft.creator=Buldyrev%2C+Sergey+V.&rft.creator=Pammolli%2C+Fabio&rft.creator=Riccaboni%2C+Massimo&rft.creator=Stanley%2C+H.+Eugene&rft.subject=HB+Economic+Theory&rft.subject=RS+Pharmacy+and+materia+medica&rft.description=Complex+systems+can+be+characterized+by+classes+of+equivalency+of+their+elements+defined+according+to+system+specific+rules.+We+propose+a+generalized+preferential+attachment+model+to+describe+the+class+size+distribution.+The+model+postulates+preferential+growth+of+the+existing+classes+and+the+steady+influx+of+new+classes.+We+investigate+how+the+distribution+depends+on+the+initial+conditions+and+changes+from+a+pure+exponential+form+for+zero+influx+of+new+classes+to+a+power+law+with+an+exponential+cutoff+form+when+the+influx+of+new+classes+is+substantial.+We+apply+the+model+to+study+the+growth+dynamics+of+pharmaceutical+industry.+&rft.publisher=ArXiv&rft.date=2005&rft.type=Working+Paper&rft.type=NonPeerReviewed&rft.identifier=++Yamasaki%2C+Kazuko+and+Matia%2C+Kaushik+and+Fu%2C+Dongfeng+and+Buldyrev%2C+Sergey+V.+and+Pammolli%2C+Fabio+and+Riccaboni%2C+Massimo+and+Stanley%2C+H.+Eugene++A+generalized+preferential+attachment+model+for+complex+systems.++Working+Paper++%23+%2F2005++++ArXiv+++++++(Unpublished)+++