Which are the main reasons for doing a PhD?
A PhD degree provides advanced and specialized knowledge on a specific field of Science. People who pursue a PhD, are usually passionate about their subject, and wish to invest significant amount of time to research and contribute in that field.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Which are the main reasons for doing a PhD?
### Input: 
### Response: A PhD degree provides advanced and specialized knowledge on a specific field of Science. People who pursue a PhD, are usually passionate about their subject, and wish to invest significant amount of time to research and contribute in that field.