Oak Brook, Ill.—Control Engineering will invite all readers and subscribers to participate in a purchasing study during Sept. 4-27 that will gather data on the buying habits and trends demonstrated by users, purchasers, manufacturers, and suppliers in the controls and automation fields. The study will gauge units bought, expenditures, and other data supplied by participants in the study. Qualified participants will be eligible to win one of five $200 e-gift certificates from Amazon.com. Many readers will receive e-mailed invitations on Sept. 4 to participate in the study, while others can access it via the "Ongoing studies" button located on Control Engineeing's website at www.controleng.com.