 So the basic notion of seller's inflation is to say that inflation can also be driven by firms and not only by workers asking for higher wages. More specifically, it's the idea that there have been major supply shocks, and as a result of this, price spikes at the beginning of the value chain. So the prices of energy, the prices of shipping, the price of commodities have been spiking and spiraling upward for a time as a result of the pandemic and the Russian war in Ukraine.