请求解析加拿大央行省级新冠疫情严格指数（SI）计算公式

Hey everyone, I’m stuck trying to wrap my head around the formula for the Provincial Covid-19 Stringency Index (SI) from the Bank of Canada’s analysis. I’ve spent time trying to unpack it on my own but want to verify I’m not misinterpreting anything—would someone be willing to walk through this formula step by step with me?

From the analysis, for a given province, each sub-index $I_j$ (which corresponds to an individual policy indicator) is defined as:

$$ I_j = 100 \cdot \frac{v_j - 0.5(F - \sum_i f_i)}{N_j} $$

Here’s what I’ve been able to pull about the variables so far (note: some of the original description cuts off mid-sentence):

• $I_j$: The sub-index score for policy indicator $j$
• $v_j$: The ordinal value representing the most restrictive measures in place within the province for indicator $j$
• The remaining variables ($F$, $\sum_i f_i$, $N_j$) are part of the formula, but I don’t have the full context on their exact definitions from the source material I’m working with.

I’d be really grateful for a clear breakdown of each component, how they interact to calculate the sub-index, and maybe even a simple example to make it click. Thanks in advance for any help you can offer!

备注：内容来源于stack exchange，提问作者stats_noob