Analysts at Macroeconomic Advisers, which prepares the monthly report, looked at Labor Department figures and believes construction employment already may have fallen by 160,000 jobs below what is being reported in current payroll data. The ADP study predicts an average 14,000 jobs lost per month over the next year and a half. The new study also found that employment in large- and medium-sized construction companies is down, while smaller companies have not had major layoffs. There’s also been a shift to different kinds of construction.