I think this is because there's a more substantial shift in perception vs. positive earnings firms if something improves in the firm's situation. (greenbackd.com)
After substantial shifts to fixed income between 2009 and 2014, the movement slowed for the next few years. (towerswatson.com)
The College, Career, and Community Writers Program relies on three interconnected elements to support teachers in making substantial shifts in their practice: professional development, curricular resources, and formative assessment. (learningpolicyinstitute.org)