Inflation has reached levels not seen in years, but there is an important distinction to be made between frictional and cyclical inflation, one that has big implications for central banks this year.----- Transcript -----Andrew Sheets Welcome to Thoughts on the Market. I'm Andrew Sheets, Chief Cross Asset Strategist for Morgan Stanley Research.Seth Carpenter And I'm Seth Carpenter, Morgan Stanley's Chief Global Economist.Andrew Sheets And on this episode of Thoughts on the Market, we'll be discussing inflation, central banks and the outlook for rate hikes ahead. It's Friday, February 18th at 1:00 p.m. in LondonSeth Carpenter and 8:00 a.m. in New York.Andrew Sheets So, Seth, it's safe to say there's focus on inflation at the moment in markets because we're seeing some of the highest inflation rates in 30 or 40 years. When we think about inflation, though, it's really two stories. There is inflation being driven by more temporary supply chain and COVID related disruptions. And then there is a different type of inflation, the more permanent stickier type of traditional inflation you get as the economy recovers and there's more demand than supply can meet. How important is this distinction at the moment and how do you see these two sides of inflation playing out?Seth Carpenter Andrew, I think you've laid out that framework extraordinarily well, and I think the distinction between the two types of inflation is absolutely critical for central banks and for how the global economy is likely to evolve from here. My take is that for the US, for the Euro area, for the UK, most of the excess inflation that we're seeing is in fact, COVID-related and frictional. And so, what we can see in the data is that we have an easing now in supply chain disruptions. Supply chain disruptions are still at a very high level, but they're coming down and they're getting better. Similarly, in the US and to some degree in the UK, there have been some labor market frictions because of COVID that have meant that some of the services inflation has also been higher than it might be otherwise. I don't want to diminish completely the idea that there's some good old fashioned cyclical macroeconomic inflation there, because that's also very important. But I think the majority of it is in the frictional type of COVID-related inflation. The key reason why that matters is what has to get done to bring that inflation back down to central bank targets. If the majority of this excess inflation is standard macro cyclical inflation, central banks are going to have to engage in sufficiently tight policy to slow the economy to create slack and bring down inflation. Now, the estimates are always imprecise, but estimates in the United States for, say, the Phillips curve, and when I say the Phillips curve, I mean either the relationship between the unemployment rate and inflation or more generally, the relationship between where the economy is relative to its potential to produce and how much there's currently aggregate demand in the economy. If we have three percentage points of excess inflation that has to be dealt with by creating slack, you're probably going to have to either cause a recession or wait many, many years to gradually chip away things to bring it down over time. It's just too large of an amount of excess inflation if it is truly that standard macro cyclical inflation.Andrew Sheets So, Seth, it's been a while since we've had to deal with rate hikes in the market. And as you just laid out, there are estimates of how much the Fed would have to raise interest rates to address inflation, these so-called Phillips Curve models and other models. But there's a lot of uncertainty around these things. How much uncertainty do you think there is around how rate hikes will act with inflation? And how do you think central banks think about that uncertainty?Seth Carpenter So I would completely agree there's uncertainty right now, and I think there are at least two important chai