R studio代写-FINC-780 -Assignment 1
时间:2021-09-24
FINC-780 Assignment 1: Effect of Financial Crisis on Corporate Profits
Concept: Most data science projects, at a very minimum, involve
answering “what is/was…” type questions using data. Sometimes, these
questions are generated in an exploratory mode, while at other times,
the questions are more formally posed by business or other entities.
There are simple ways to answer questions using visualization or
tabulation and without resorting to advanced statistical analysis. In
this project, you will use tabulation to answer some real-world data
questions. You will showcase your ability in using dataframes and in
using packages such as dplyr and data.table. You will also showcase your
ability to report results of a data project using Markdown.
Requirements: You are provided with a csv file containing annual
financial data for firms. Three important columns: fyear = fiscal year;
tic = firm ID, ni = net income. Using this information, you shall answer
the following questions and the other requirements that follow the
questions: 1. Overall, what is the effect of the crisis in financial
terms? You can answer this by calculating the percent by which average
annual net income decreases for firms during crisis years (2007-8)
compared to pre-crisis years (2004-6). 2. What are the 10 firms with the
largest and smallest changes respectively? List results for absolute
change and percent change separately. 3. How long does it take for firms
to recover from the crisis? You can follow the following algorithm. For
each firm in the sample, identify the highest Net Income in the
pre-crisis period. Focusing now on the post-crisis period of 2009-14,
identify when this highest level was breached and set the variable
‘YearsRecover’ equal to the difference between year level breached and
2008. If the highest level was not breached, set ‘YearsRecover’ to NA.
Summarize this information in a table. Show key steps in your work and
be sure to demonstrate proficiency in dplyr or data.table or both. Also,
produce a data-supported overall conclusion concerning the effect of
the crisis on corporate profits. Use Markdown skills to format the
report appropriately. Recall that a formal report has components such as
introduction, body, and conclusion, and is labelled and formatted
appropriately. Submission: pdf with pages <= 8.