rdchem: rdchem

rdchemR Documentation

rdchem

Description

Wooldridge Source: From Businessweek R&D Scoreboard, October 25, 1991. Data loads lazily.

Usage

data('rdchem')

Format

A data.frame with 32 observations on 8 variables:

  • rd: R&D spending, millions

  • sales: firm sales, millions

  • profits: profits, millions

  • rdintens: rd as percent of sales

  • profmarg: profits as percent of sales

  • salessq: sales^2

  • lsales: log(sales)

  • lrd: log(rd)

Notes

It would be interesting to collect more recent data and see whether the R&D/firm size relationship has changed over time.

Used in Text: pages 64, 139-140, 159-160, 204, 218, 327-329, 339

Source

https://www.cengage.com/cgi-wadsworth/course_products_wp.pl?fid=M20b&product_isbn_issn=9781111531041

Examples

 str(rdchem)

wooldridge documentation built on May 3, 2023, 5:06 p.m.