A number of explanations for the observed decline in GDP volatility since the mid‐1980s have been offered. Valerie Ramey and Daniel Vine (2003a, 2003b) in a couple of recent papers offer the hypothesis that a decline in the persistence of sales is an explanation for the decline in GDP volatility. Their models show that a decrease in sales persistence leads to a decline in the variance of prod...

The growth form of a vine profoundly influences its overall performance as well as many aspects of a grower's vine management. Therefore, I place the choice of a vine training system fourth in importance when establishing a new vineyard after: (1) whether or not to plant a vineyard, (2) the site for the vineyard, and (3) the variety/rootstock combination to be planted. The increasing recognitio...

Vine vigour involves the production capacity of the vine. Production capacity encompasses shoot and leaf production, as well as grape production. It would benefit grape production systems to find the correct balance between the vegetative growth (shoot and leaf “production”) and reproductive development (grape production). One could optimise vine performance by improving vine balance. Vine bala...

Thanks to the increasing popularity of mobile devices and online social networks, mobile and social video is on the rise, calling for a better understanding of its usage and future impact. In this paper, we provide an in-depth measurement study of Vine, a mobile application that is used for creating and sharing short looping videos of up to six seconds in length. Based on a dataset of 851,039 t...