As an expert in study abroad applications, I believe that if you want to apply for the PhD program in Economics at the University of Nottingham, you need to meet the following admission requirements:

1. Academic Background and Grades: Typically, applicants need to hold a relevant Master's degree and have an excellent academic transcript. Specifically, the PhD program in Economics at the University of Nottingham requires its applicants to obtain at least a 65% average mark in their Master's coursework.
2. Research Plan and Proposal: During the application process, you need to submit a research plan and proposal. These documents should explain your research plan, methods, and objectives, as well as demonstrate your ability to complete the research.
3. Letters of Recommendation and Personal Statement: The University of Nottingham also requires applicants to provide at least two letters of recommendation from experts or mentors in the relevant field. Additionally, you need to submit a personal statement that outlines your academic and practical background, and why you are a suitable candidate for the program.
4. English Proficiency: As English is the language of instruction for this program, applicants from non-English speaking countries need to provide English language test scores (such as IELTS or TOEFL) to demonstrate their English language ability meets the University of Nottingham's requirements.

Overall, the University of Nottingham's PhD program in Economics has strict requirements for applicants and requires them to excel in academic, research, and language aspects. If you wish to apply for this program, we suggest that you prepare in advance, thoroughly research relevant information, and seek the assistance of professional study abroad service providers, such as WordSunny, who can provide you with professional guidance and help ensure the success of your application.