1. Processing bulk data from the Internet
Calculating clothing price indices for the CPI
Karlijn Bakker

2. Internet data collection Practices Results
Contents
Goals of the project
Internet data collection
Practices
Results
Processing bulk data from the Internet

3. Develop a price index for clothing based on internet prices
Goals of the project
Efficiency
Develop a price index for clothing based on internet prices
Compare internet data with scannerdata
Processing bulk data from the Internet

4. Internet data collection
Daily price collection for 2 online clothing retailers
The robots collect all items it can find on (a part of) the site
The robots collect prices and characteristics of the goods
Processing bulk data from the Internet

5. Computerized processing required Average price approach
Processing bulk data
Computerized processing required
Average price approach
Dividing items into groups
Processing bulk data from the Internet

6. Aggregation
Processing bulk data from the Internet

7. Use hidden information Use the location on the website
Making groups
Use the article name
Use hidden information
Use the location on the website
This depends on the site.
Processing bulk data from the Internet

8. Example
Processing bulk data from the Internet

9. Results look promising Risk: sites can change Research continues
Conclusion
Results look promising
Risk: sites can change
Research continues
Processing bulk data from the Internet