Recent productivity acceleration has been

multiple choice $2$

$-$positively influenced by economies of scale because for firms selling digital or information products expanding production has a very low marginal cost.

$-$negatively influenced by economies of scale because modern firms selling digital or information products have high start$-$up costs.

$-$positively influenced by economies of scale driven by digital or information based products because it has enabled us to encourage mergers.

$-$negatively influenced by economies of scale because the digital nature of modern business now requires costly security to protect information systems.