It's difficult to determine which countries have the highest advertisement spending in the world, as it
can vary year by year and depend on a variety of factors such as the size of the economy, the level of competition, cultural trends. However, some of the countries that are consistently among the top spenders on advertising include the United States, China, Japan, Germany, and the United Kingdom.
In terms of advertising as a percentage of GDP, some of the countries with the highest ratios include Qatar, Bahrain, and the United Arab Emirates. However, it's important to note that these countries have much smaller economies compared to the previously mentioned countries, so their absolute advertising spending may not be as high.
Overall, advertising spending is a complex and dynamic field that is influenced by many factors, and it can be difficult to make definitive statements about which countries are the highest spenders.