That there were immense trade increases during the period when the new member states were joining does not necessarily show causality or that these same increases would not have been created without EU membership. Development and economic integration is something that will occur regardless of whether applicant countries join the European Union or not. There would likely have been a similar growth in trade if these states had joined the network of free trade agreements such as the European Economic Area instead of full membership of the European Union.  The 0.3% of GDP figure for the financial transfers from the old to new member states the proposition gives may be accurate but 0.3% of GDP per year is not insignificant. Germany paying 0.3% of its GDP would still be almost 7.5 billion Euros. It is also questionable whether further expansion would be as beneficial as the most recent expansions as the new members would be getting progressively poorer and poorer compared to current members. Macedonia’s GDP per capita for example is less than 10% of the 15 pre enlargement member states. They are therefore going to benefit current member states through trade less while costing more.