Microeconomics 14th Edition by James Gwartney ,Richard Stroup,Russell Sobel ,David Macpherson

Exercise 11

"Physical obstacles like bad roads and stormy weather increase transaction costs and thereby reduce the volume of trade. Tariffs, quotas, exchange rate controls, and other human-made trade restrictions have similar effects." Evaluate this statement. Is it true? Why or why not?
* Asterisk denotes questions for which answers are given in Appendix B.