Disagree:
Index numbers have certain limitations. Some of the major limitations are:
1. **Selection of Base Year**: The choice of base year can significantly affect the index number.
2. **Non-availability of Reliable Data**: Index numbers require accurate data, and if the data is unreliable, the index number will be inaccurate.
3. **Subjectivity in Weights**: The selection of weights for different components of the index can be subjective and may affect the outcome.
Final Answer:
\[
\boxed{Disagree: \; There \; are \; limitations \; in \; index \; numbers, \; such \; as \; base \; year \; selection \; and \; data \; reliability.}
\]