Ipoteza formulata de M.P. McNair care explica tiparele de schimbare in vanzarea cu amanuntul; ipoteza spune ca noii vanzatori cu amanuntul scad pretul prin reducerea sau eliminarea serviciilor in favoarea clientului, dar odata ce devin stapanai pe situatia lor cresc preturile si calitatea serviciilor, devenind astfel la randul lor vulnerabili in fata noilor vanzatori.
A hypothesis of M.P. McNair explaining the patterns of change in retailing; the hypothesis is that new types of retailers cut prices by lowering or eliminating customer services, but once established they increase prices and customer services and so become vulnerable themselves to new, low-price retailers.
