Some few business doubts which i want to clear and need some definitions:
1. Niche Market?    <---
                                         | can any one give me a simple and clear definition with an example.
2. Loss Leader?      <---
3. A past paper question(2002 N/O, paper1, Question 3 part c) 
    There i have done the question with ROCE and Net profit margin.. 
    In 2002 i get ROCE = 20% and Net profit margin as 10% 
    while in 2003 ROCE = 25% and Net profit margin as 8.33% 
    so can anyone tell me what is the answer?