RDP 2009-02: Competition Between Payment Systems Equation (10)

1 = D 0 m + D i , ~ j m + D j , ~ i m + D i , j m . MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaGymaiabg2 da9iaadseadaqhaaWcbaGaaGimaaqaaiaad2gaaaGccqGHRaWkcaWG ebWaa0baaSqaaiaadMgacaGGSaGaaiOFaiaadQgaaeaacaWGTbaaaO Gaey4kaSIaamiramaaDaaaleaacaWGQbGaaiilaiaac6hacaWGPbaa baGaamyBaaaakiabgUcaRiaadseadaqhaaWcbaGaamyAaiaacYcaca WGQbaabaGaamyBaaaakiaac6caaaa@4D3C@