What's the Difference Between PERQ/HCI and ACNielsen HCI?

PERQ/HCI:
For publishers and agencies

• Provides audits such as Journal Ad Review™(JAR) covering ad expenditures to physicians and other healthcare professionals
• Provides audits covering journal readership (Media-Chek® and FOCUS™)

ACNielsen HCI:
For manufacturers

• Provides the promotional tracking products and promotional planning models described on the ACNielsen HCI Web site.