# Tagged Questions

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### Decomposition property of conditional expectation function

Let $Y$ be the outcome variable and $X$ and $U$ be covariates. The well known decomposition property of CEF is given by: \begin{align*} Y=E(Y|X,U)+e \end{align*} where \begin{align*} E(e|X,U)=0 \end{...
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### Reducing the dimension for partial string matching between two large files

I have two very large files, including POIs and have a tool that could do fuzzy matching between each pair of strings between these two files. The problem is that, it is an ...
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### Road influence area, composite value, composite score

Is it possible to generate a composite value that pertains to geographical area? If so, what would be the possible variables to be considered? I would like to have a single figure (as in the composite ...
61 views

### Calculating Demand Index from page views and enquiries

I am from computer science background and a bit new to statistics. Currently I am working for a online property portal and part of my work is to create indices for different statistical measures. ...
297 views

### Which econometric indices are best for macroeconomic variables?

I want to test index models that are applicable to macroeconomic data to test my hypothesis in R or some other statistical software (I have most of them). The properties of most of the macroeconomic ...
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### Derivation of the Simpson index

I'm interested in the derivation of the Simpson diversity index. I found the normal interpretation of this index, but I'm not able to see what's the "mathematical background" of the formula. I read ...
788 views

### How to create an index with only categorical variables (dichotomous, nominal and ordinal) only?

I am currently conducting a study about the involvement of male in family planning. It is of interest to create an index for the involvement of male in FP. My variables were only categorical variables ...
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### What is the accepted concept behind measuring the contribution of subindexes to aggregate level indexes?

I am trying to find an additive decomposition of a Tornqvist index - to measure the contribution of individual industries to sector-level productivity indexes - and I can find formulae for this, but ...
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### Can I simply subtract an index from another?

I am currently using a measure of the price level (CPI) from which I would like to remove the effects of food prices (also an index). Notice that food prices are included in the CPI (so that CPI is ...
942 views

### How to create indexes from “open” variables

I am running an impact evaluation to investigate the impact of a specific program on several indicators x. These indicators have values between 0 and up to 10000, and a high standard deviation. For ...
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### Creating an index that measures how accurate economsits are at predicting the US economy

I am interested in building an index that tracks how accurate economists are at predicting several US economic statistics: US Jobless claims number: comes out weekly, ranges from 100k to 400k, ...
773 views

### using stl (seasonal decomposition with loess) for weekly data

I am trying to decompose a weekly time series using the R function 'stl'. One of the important argument of this function is the number of data per cycle. Naturally in this case one would choose 52. ...
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### Is there a data decay method that decays data based on how much new data it receives?

So here's the situation: There are n balls. Each ball has been voted on a scale of 1-N by an arbitrary number of people. Every day (or every week, or more), some/most/all of the previous voters and ...