"When he was unable to find the statistics he needed for his report on market demand, Raphael decided to estimate based on historical and current data and trends reported" by the UN. One problem with this is .

The reliability and accuracy of the forecasts might decrease.

Explanation:

Trend analysis is the general practice of the collection of information in order to spot a pattern. Even though it is used to forecast future events, it can also be used for the estimation of unknown events in the past. Because trend analysis is hinged on historical data, the reliability and accuracy of the forecasts deteriorate when there is a change in business environment or when cyclical trends is mistaken for long-term influences. Also, when one does not know the changes that might affect a business, forecasts on trend analysis might not be reliable.

answer; o anticipate where news will happen;

answer; buyer guide;