# Author: Rashmi Sajwan

## Establishing a relationship between FDI and air pollution in India

By Saptarshi Basu Roy Choudhury & Rashmi Sajwan on November 4, 2018

In India, in the last two decades, the inflow of FDI has grown significantly. Similarly, its environmental pollution has also been rising since 1991 due to an increase in economic activity. This article empirically investigates the impact of FDI on air pollution in India.

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## How to test time series multicollinearity in STATA?

By Saptarshi Basu Roy Choudhury & Rashmi Sajwan on October 24, 2018

The problem of multicollinearity arises when one explanatory variable in a multiple regression model highly correlates with one or more than one of other explanatory variables. It is a problem because it underestimates the statistical significance of an explanatory variable (Allen, 1997).

## How to perform Granger causality test in STATA?

By Rashmi Sajwan & Priya Chetty on October 16, 2018

Applying Granger causality test in addition to cointegration test like Vector Autoregression (VAR) helps detect the direction of causality. It also helps to identify which variable acts as a determining factor for another variable. This article shows how to apply Granger causality test in STATA.

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## How to perform Heteroscedasticity test in STATA for time series data?

By Rashmi Sajwan & Priya Chetty on October 16, 2018

Heteroskedastic means “differing variance” which comes from the Greek word “hetero” (‘different’) and “skedasis” (‘dispersion’). It refers to the variance of the error terms in a regression model in an independent variable.

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## Slacks based measure or SBM analysis in DEA

By Avishek Majumder & Rashmi Sajwan on September 19, 2018

Slacks based measure or SBM analsysis is a non-radial model to solve the problem in the “additive model” developed by Charnes, Cooper, & Rhodes in 1978. This model can discriminate between efficient and inefficient Decision-Making Units (DMU).

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