Ailworth and Faucon describe the ways in which shale oil producers such as Continental Resources in Texas and S. Dakota are responding to the drop in oil prices. One strategy adopted is to put off 60% of the expense of production by not completing the final stages of production of hydraulic fracturing, but keeping the wells ready so that production can quickly be ramped up if prices go to the $60-65 range. EOG Resources, Andarko, Apache, Chesapeake Energy, are also following this strategy. There are about 3000 such wells, not pumping but drilled and ready for hydraulic fracturing, according to RBC Capital Markets estimates. This strategy would mean large shale oil supplies well into the future to keep oil prices low. Production from lower cost wells continues with U.S. oil production climbing to a new high of 9.4 million barrels a day for week ending March 6, 2015, according to federal data. This shows that this is a new situation and the resilience of shale oil supplies may have been underestimated. Another strategy adopted by other large companies such as Exxon is to continue to develop technology by learning to get the oil out of the rock in the most cost efficient way. The capital investment in U.S. shale oil has dropped by $50 billion in 2015 compared to 2014. The number of oil rigs drilling declined to 866 in the U.S. by March 2015, according to Baker Hughes....