In recent years, big data has become a buzz word for them who are relying on digital technologies as it allows storage and analysis of massive data. Here, big data includes both structured and unstructured data sets which require processing capabilities of modern tools. One of the most popular tools to handle big data is Advanced Excel and its relevant add-ons (Rose, Spinks, & Canhoto, 2015).
Measuring efficiency to benchmark the performance of firms and organisations is important. In one of the recent projects, the analyst found Statistical Package for Social Science (SPSS) and MS Excel to be unsuitable to process data collected to measure efficiency. Thus, application of specific efficiency testing software is important and data envelopment analysis (DEA) program is one of them.
Data entered in STATA can be classified either as numeric or string type. Associated with each type of data is its storage type i.e. the numbers are stored as byte, int, long, float, or double. STATA takes “float” as the default storage type for its variables. Similarly byte, int and long are usually used to hold integers. The table given below defines the storage type with minimum and maximum value for each variable along with byte size. Read more »
Do-file is an interface in Stata which allows the researcher to compile all the commands and results at one place. Once the commands are stored in do file, one do not need to enter the command again. One can simply run the do file and get all the results at once. Unlike SPSS wherein, the output sheet is automatically generated every time you run a test. All the commands and results in this file can be mailed together. Read more »
Correlation analysis is conducted to examine the relationship between dependent and independent variables. There are two types of correlation analysis in STATA.
- Pairwise correlation which treat each pair of variables separately and only includes observations which have valid values for each pair in the data set.
- The second type of correlation is the normal correlation which takes the entire data set as one and calculates the correlation for all valid values.
STATA, like SPSS is a smart data analysis tool used for data management and analysis. It is a fast and easy to use, across all operating systems such as Windows, Unix and Mac. Our module is based on Windows version of STATA 11.0. Read more »
Event study helps to determine the effect of an event on a dependent variable. In most cases event study is used to determine the impact of an event on the stock prices of a company. The main motive of the event study is to find whether the event has abnormal returns on the prices of the stock. In other words whether the prices would have changed if the event has not taken place. To conduct the event study following steps can be followed: Read more »
In one of my recent projects I had to use panel data for analysis. During the data analysis I faced some problems which may be the most common problems in panel data analysis. So here are some of the problems with their possible solutions that helped me.