Growth in global advertising market in 2013 - Magna Global/Mediabrands, which is an authority on media value and market conditions at global level, forecasts growth of 3.1% in world advertising revenue in 2013. The June 2012 forecasts were revised downwards due to the slowdown in economic growth in Europe and the United States, as well as the cautious marketing spending noted in many territories in the second half of the year. The global advertising market reached $495 billion in 2012, in...