What are sanctions, and what will be the impact of sanctions on Russia?

As opponents to Russia's invasion of Ukraine seek to isolate Moscow, we ask an expert: what are sanctions, do they work, and how will the sanctions and Russia's counter measures change the geopolitical landscape? Mikael Wigell, Research Director at the Finnish Institute of International Affairs and the author of, among many other publications, Geo-economics and Power Politics in the 21st Century, has plenty to say about the efficacy - or otherwise - of sanctions and gives his view on what we should look out for now - not least what China does - and what might be the unexpected consequences of what he calls a new cold war.