There's this, which seems uncontroversial. https://people.duke.edu/~charvey/Teaching/BA453_2004/Street_research/GS_IC_Sept_8_1999.pdf https://people.duke.edu/~

There's this, which seems uncontroversial. https://people.duke.edu/~charvey/Teaching/BA453_2004/Street_research/GS_IC_Sept_8_1999.pdf https://people.duke.edu/~charvey/Teaching/BA453_2004/Street_...