Answer briefly questions below: What is ERC and its meaning 2. List two possible ways to measure investor's earnings expectations.

Answer briefly questions below:

1.    What is ERC and its meaning

2.    List two possible ways to measure investor's earnings expectations.

3.    What are narrow window studies and wide window studies in accounting research, and what are they used for respectively.

4.     List Fair value hierarchy according to IFRS 13, ASC 820-10