The study looked at how the ratio of house prices to rents can predict future changes in real estate prices and rents. They found that this ratio can help forecast changes in prices over 4-year periods, but it doesn't work as well for predicting rent changes. The researchers also discovered that using a certain regression method can lead to biased estimates if house prices don't follow a random pattern. Overall, the results suggest that the rent-price ratio can give us clues about how properties are valued in the housing market.