But there are also growing concerns that companies are not taking data privacy seriously enough. Partly as a result of this, a number of governments are enacting legislation to better clarify what information about individuals companies can collect and retain and what they can do with this data. To this extent, anti-competitive effects that arise may be transient. However, significant welfare losses may arise from these anti-competitive effects before one platform or entrenched business model is replaced by another. Measures of productivity in the United States, for instance, suggest a significant slowdown since 2005. Several explanations have been given to explain this discrepancy, including the mismeasurement of inputs and outputs, and delays in the time needed for technological change to work itself throughout the whole economy.