Mid-sized firms and B2B companies are struggling the most at improving the effectiveness of their marketing efforts, according to the results of a landmark survey of more than 400 companies by strategic marketing consultancy CMG Partners and market research firm Chadwick Martin Bailey. The recently released study -- entitled The Marketing Performance Advantage -- found that while 75% of all participants expressed interest in measuring the performance of their marketing initiatives, mid-sized firms and B2B companies were also more likely to report having no measurement in place or only limited measurement. For example: