This study examines how the timing of waste disposal fee collection affects producer’s choice built-in product durability and social welfare in a durable-goods monopoly model. We categorize policies into two: advance (ADF) policy (DF) policy. show that DF has two opposing effects on durability. Firstly, gives producer an incentive to increase order delay households’ discount future payments (th...

The effects of massive dumping dredged material were studied during and after the last large Barcelona port expansion. A benthic tripod equipped with a current meter, turbidimeter video camera was deployed at edge shelf dumpsite. Additionally, sediment cores taken before, location. Previously, samples in expansion area. Dumping generated frequent (10–19 per day), high (>203.2 mg L −1 ) short (5...