The poor relations between the two states were hampered by disputes over sections of the border, which was not finally delimited until 1929. A subsequent commission set about conducting on-the-ground demarcation, however there were continuing disputes over certain sections of the boundary. These were allocated via a treaty signed on 27 February 1935, with a final border treaty being signed on 9 March 1936. Despite this, Dominican dictator Rafael Trujillo subsequently launched a wave of anti-Haitian violence in 1937, culminating in the Parsley massacre in which thousands of Haitians living in the DR were forced across the border or killed. Though relations since then have improved, the two countries remain deeply divided on demographic, political, racial, cultural and economic lines. Haiti's political situation is volatile, and the economy of the Dominican Republic is ten times larger than that of Haiti, prompting many Haitians to move to the DR seeking better opportunities, where they are often the subject of discrimination.