The H-1B is an employment-based, non-immigrant visa category for temporary foreign workers in the United States. Every year, the US immigration department receives over 200,000 petitions and selects 85,000 applications through a random process. The application data is available for public access to perform in-depth longitudinal research and analysis. This data provides key insights into the prevailing wages for job titles being sponsored by US employers under H1-B visa category. In particular, I utilize the 2011-2016 H-1B petition disclosure data to analyze the employers with the most applications, data science related job positions and relationship between salaries offered and cost of living index.

The Office of Foreign Labor Certification (OFLC) generates program data that is useful information about the immigration programs including the H1-B visa. The disclosure data updated annually is available at https://www.foreignlaborcert.doleta.gov/performancedata.cfm

• Click on Disclosure Data tab
• Go to Section LCA Programs (H-1B, H-1B1, E-3)
• You will find data from 2008 onwards.

• R
• R Studio
• Packages: readxl, dplyr, hashmap, ggplot2, ggmap, ggrepel

Use install.packages("package_name") to install new packages in R.

• data_processing.md: Markdown document illustrating the key data transformations on the raw dataset.
• data_analysis.md: Markdown document illustrating with code for plots and corresponding data analysis.
• helpers.R: helper functions used mainly for data analysis
• spell_correcter.R: A suite of functions for performing spell correction in a given vector using the frequencies of occurrence of different elements in the vector.
• coli/: Python Scrapy code directory for scraping cost of living plus rent index. The spider crawl file is the main file describing how the data should be scraped.

I extended this project to build a Shiny app based on the transformed data set.

• Explore the app!

• GitHub repo

Please read my blogs for key data insights and more details:

• Data Analysis

• Shiny app

I have released the transformed dataset on Kaggle for public use under CC BY-NC-SA 4.0 License.

• Kaggle Dataset page

• Exploration Round One kernel

• OFLC Performance data

• How to Write a Spelling Corrector

Open sourced under the MIT License.