Die DDR und Polen haben von 1945 bis 1989 versucht, das kollektivistische Modernisierungsprojekt zu verwirklichen – den real existierenden Sozialismus. Das Buch vergleicht die unterschiedliche Entwicklung der systemtheoretischen und wirtschaftspolitischen Ideen in beiden Ländern. Trotz einer...

There is growing interest in identifying the drivers of and barriers to green purchasing, and many publications focus on motivational factors. However, the effects of these factors on the activities and means applied to sustainable purchasing are seldom investigated. This paper addresses this...

Deterministic EOQ-type two-store reverse logistics systems was studied extensively in the literature. All this proposition assumed a predetermined control system and searched the optimal parameters for this control systems. There are no results regarding the structure of optimal policies. The...

The aim of the paper is to investigate a reverse logistics model. Schrady (1967) has examined a model with two stores, where the returned items are repaired then used as new one. The not repairable items are disposed of and the required products are procured. The author has analyzed the model...

The aim of the paper is to investigate the model of Richter (1996). The model examines a reverse logistics problem. The proposed inventory holding policy in this model was predetermined. We will show that the proposed predetermined policy is optimal, as well. ; Richter (1996) egy két műhelyes...