However, since the enactment of Vietnam's "doi moi" (renovation) policy in 1986, Vietnamese authorities have committed to increased economic liberalization and enacted structural reforms needed to modernize the economy and to produce more competitive, export-driven industries. The communist leaders, however, maintain control on political expression and have resisted outside calls to improve human rights. The country continues to experience small-scale protests from various groups - the vast majority connected to land-use issues, calls for increased political space, and the lack of equitable mechanisms for resolving disputes. Various ethnic minorities, such as the Montagnards of the Central Highlands and the Khmer Krom in the southern delta region, have also held protests.