A. plot the stock price, yen/$ exchange rate and their returns. by looking at the plots, comment on the stationarity of the series.
b. obtain the correlogram (autocorrelation function) for each of the series and comment on stationarity (or non-stationarity).
c. using augmented dickey-fuller test (adf), test whether prices have a unit root or not.
eviews instructions:
double click on the variable of interest. next click:
view-> unit root test->
use a specification with "intercept" for the unit root tests. note that in eviews you would need to click on one of the options (e. g. intercept).
r instructions: see my sample programs in module 3
d. using augmented dickey-fuller test, test whether returns of all series
have a unit root or not (use "intercept" specification).

Upscale hotels in the united states recently cut their prices by 20 percent in an effort to bolster dwindling occupancy rates among business travelers. a survey performed by a major research organization indicated that businesses are wary of current economic conditions and are now resorting to electronic media, such as the internet and the telephone, to transact business. assume a company's budget permits it to spend $5,000 per month on either business travel or electronic media to transact business. graphically illustrate how a 20 percent decline in the price of business travel would impact this company's budget set if the price of business travel was initially $1,000 per trip and the price of electronic media was $500 per hour. suppose that, after the price of business travel drops, the company issues a report indicating that its marginal rate of substitution between electronic media and business travel is 1. is the company allocating resources efficiently? explain.

phillips, inc. had the following financial data for the year ended december 31, 2019. cash $ 41,000 cash equivalents 75,000 long term investments 59,000 total current liabilities 149,000 what is the cash ratio as of december 31, 2019, for phillips, inc.? (round your answer to two decimal places.)

You meet that special person and get married. amazingly your spouse has exactly the same income you do 47,810. if your tax status is now married filing jointly what is your tax liability