0.1 General background

When a transaction binds a national of one state and another state, a number of challenging questions arise, such as, Can a sovereign state restrict itself because of an investment contract between itself and a foreign national or corporation? Is there a sovereign state able to breach the contract for its public good? If so, do foreign investors have a right to be compensated? Can the home state interfere in a dispute between its national and another sovereign? If the investor is a corporation instead of an individual, which state is its home state under international law?