Abstract Invasive species pose a threat to the livelihoods of many people living on rangelands western United States. impact ecosystem goods and services areas they invade represent one largest causes habitat degradation. On private ranches, economic analyses often find that conservation practices, such as invasive control, are not economically viable, in contrast what is found at landscape sca...

We propose a new category of consumption goods, memorable goods, that generate a flow of utility after consumption. We analyze an otherwise standard consumption model that distinguishes memorable goods from other nondurable goods. Consumers optimally choose lumpy consumption of memorable goods. We empirically document differences between levels and volatilities of memorable and other goods expe...

in sale of goods, the delivered goods must conform both to what is the subject of contract and to what the parties intend. conformity of goods has two aspects: legal and material. the legal aspect, with which this article concerns, consist of such topics as right of sale, ownership of seller, lack of third party’s claim and so on .since domestic and international transactions are increasing, th...