Final answer:
Business periodicals and federal agency publications are beneficial when evaluating economic trends.
Step-by-step explanation:
Business periodicals and federal agency publications are beneficial when evaluating economic trends. These sources provide up-to-date information on market conditions, industry developments, and economic indicators such as GDP, inflation, and unemployment rates. For example, business magazines like Forbes or the Wall Street Journal offer in-depth analysis and reports on economic trends that can help individuals and businesses make informed decisions.