What is a number estimated as a Tornqvist Index? In the Solow growth model, to compute economic output $Y$, you need variable $A$ being total factor productivity. I found some data about my country's TFP but it's estimated as a Tornqvist Index. What does it mean? Can I simply use that number in the equation to calculate $Y$?
I've seen the Tornqvist used as many measures of total factor productivity but have not seen it in conjunction with the Solow growth model. My understanding of how the Solow growth models measures TFP is by having values for economic output, labout and capital, and assigning the disparity to TFP.