How to calculate cumulative expected change in Stata

[Chang-Deok Kang]

Hello,

I am wondering how to calculate cumulative expected change in housing price by Stata for Figure 4. in the link below.

They made it after modeling hedonic price models.

Chang-Deok Kang

Link to Taylor and Francis Online: https://doi.org/10.1080/02723638.2017.1360041

[Phil Bromiley]

You'll increase your changes of a useful answer by following the FAQ on asking questions - provide Stata code in code delimiters, readable Stata output, and sample data using dataex. Also, if you can state your problem in simple stat terminology, you're more likely to get help. For example, we don't know exactly what estimation routine you're using.
I'd just guessing about your model, but if the dv is change in price, then you can predict change in price. Then generate with the sum function will do your cumulative values.